We'll start with the high-pressure side as it leads from the engine to the passenger compartment:. Problems with the air conditioning unit often develop over time, which is why it's important to schedule regular visits that include an A/C performance check. The AC orifice tube / expansion device filters and regulates the … Car Questions. Why should we hire you? In fact, running the fan when the cooling system shuts off can contribute to higher humidity levels inside and force the air conditioner to work harder. 2. Technician B is wrong because temperature door position does not affect compressor operation on a manual system. Dr. Kershaw was among the first to receive ASE certification in 1972. If your AC just doesn’t work, period, your first line of defense is to … Car Questions? There are many reasons to ask a question let alone a car question. Manufactures Auto Accessories. If you live within 5 miles, we will pick up your car for service. With power and a ground, the clutch should have worked unless the gap is too wide, and is the most likely cause. Your car’s AC System may be something you take for granted — until you encounter a problem. This troubleshooting checklist and visual/audio examination is not designed as a complete diagnosis, but rather a visual observation once you have made note of the symptoms on your checklist. Why is the valve lifter on a 2007 Silverado pickup truck going bad, even after we just replaced it? A clogged radiator is the most likely cause because a restriction of any kind in the cooling system will cause an engine to overheat. Technician A is wrong because a stuck thermostat causes overheating resulting in high temperatures and plenty of heat. There are many things that can cause your car’s AC (air conditioning) to malfunction. How can I tell if my air conditioner is broken? The clutch should not be engaged when the AC is turned off. Collecting Initial Information Turn the air conditioning on while the car is running. The cabin temperature need to be at 23 C and the ambient air is 30 C. Design a system for this capacity. AutoMD answers your auto repair questions by giving free help and advice from our community members. Technician B is wrong because the high blower is controlled by the high blower relay not the resistor trio. This check can be performed with the engine running and your AC turned on to maximum by raising the hood on your auto and doing a visual and audio observation. ASE defines heating and air conditioning as an individual service area. auto air conditioning troubleshooting guide. One Of The Company's Products Is A Set Of Seat Covers That Can Be Adjusted To Fit Nearly Any Small Car. B is wrong because high low-side and low high-side pressure indicate internal compressor damage. The most common problem experienced when turning on your auto’s air conditioning system is a lack of cool air or an intermittent level of temperature. Courtesy of Toyota. Some of the more common are small leaks in the system such as hoses or connector valves in the AC unit itself, the AC’s clutch could be malfunctioning. Faulty compressor clutch: If the clutch is not engaging with your compressor, than your compressor can’t maintain the correct pressure. The Experts on JustAnswer have handled many thousands of questions and resolved problems, including: Besides oil changes, what else can I do to maintain my 1998 Toyota Camry so that it lasts longer? Regular check-up of parts like. Condenser – It is the device looks like a small radiator and is used after the compressor as it provides condensing i.e. The next time you have questions about your heating and air conditioning system or home maintenance issues in general, remember Experts In Your Home. Our heating and air conditioning experts serve Chico, Paradise, Oroville and surrounding areas. All auto AC repairs should be performed by a mechanic certified by the ASE in automotive air conditioning systems such as those at All State. If the fuse associated with your A/C system goes, the power to certain parts will stop. Ask a mechanic for help and get back on the road. Fast Testing and Certificates Serving San Gabriel, Arcadia, Pasadena, Pomona, Monterey Park, Monrovia, Temple City, Rosemead. Technician B is right because when the system is low on coolant there is insufficient material to transfer the heat. Feel free to ask automotive related questions and get the answers to all your car related issues. Both technicians are correct. C is wrong because when both high and low-side pressure are low you can have the following faults: low charge, suction line obstruction, clogged orifice tube, stuck closed TXV valve and restricted line from the condenser to the evaporator. Any one of these exhibiting a faulty connection or improper fitting could cause the unit to malfunction. Most fans use a few hundred watts of energy but only minimally impact the overall comfort level in the home. Auto AC Repair. Instead just step back at a safe distance and look for the AC unit/compressor which should look something like the sample featured above, and do a simple visual/audio check of the unit looking for any signs of hose leakage, belt slipping or clutch activation or freezing of any moving part. Courtesy of Toyota, When both the low and high sides are high, this indicates a refrigerant overcharge or restricted condenser. A stuck expansion valve is the most likely cause based on both high and low pressures being low. When the expansion valve is stuck closed, both high and low pressure are low. When that occurs we tend to lok to someone with experience for answers. All automotive air conditioning systems are (nearly) closed loops with a high-pressure side and low-pressure side. Car air conditioning using CO2 We need 5 tons of refrigeration using a CO2 cycle as indicated. Identifying the Issue Start the vehicle and turn on the air conditioner. I learn very quickly and am eager to perform well, and gain knowledge about the trade. In our Online Automotive HVAC Essentials Certificate Program, you’ll take HVAC classes and learn automotive engine heating and cooling systems, air-conditioning systems basics, rules, EPA regulations, and safety practices for working with refrigerants, and how to troubleshoot techniques of automotive heating and air-conditioning assemblies. I also work very well with other workers and can solve problems easily with a team." Technician A is correct. In which case, a relatively simple and affordable system recharge will solve the problem. Technician B says when replacing O-rings you lubricate the O-ring with the correct refrigerant oil to prevent nicks and ease installation. If you have any questions at all, you can always give us a call or come by our shop. Technician B is right because the upper radiator hose should be too hot to hold. When the refrigerant is drawn into the compressor, it is in a low-pressure gaseous form. Practice Test was written by Dr. John Kershaw, an ASE test prep expert: ASE test question developer; ASE Certified Master Technician; ASE Master Truck Technician; and Auto Industry Technical Instructor. Questions by Make. Copyright © 2009-2021 Tests.com LLC - All Rights Reserved. 8°F) (Critical Temperature of CO) Temperature of passenger cabin. Use the key to start the car and … An air conditioner lowers the inside temperature of your vehicle. Our expert diagnosis can save you both time and money. All Car Specialists is a certified automotive repair and alignment shop in Los Angeles. The Company Has A Standard Cost System In Use For All Of Its Products. Below are some common AC repair issues and their fixes: Refrigerant leaks. We are providing: Please call to schedule your appointment today! Car Questions and Answers . … Who is right? Ask an Automotive Expert. All-Car…. The following auto AC troubleshooting guide, tips and worksheet will help to save you time and money once you schedule your AC check. Any attempts to drive your auto under those circumstances could cause severe damage to the engine, as if the belt breaks due to heat and friction of the frozen AC then none of your other components that rely on the belt would continue to function and that could be costly. Technician A is right because a misadjusted blend door affects heat. Air Conditioning Quiz Questions Answers ) Search for: Related Pages. A specific engine temperature is needed to consume all of the pollutants. One of the typical reasons air conditioners don’t work properly is a clogged or dirty filter. Refrigeration System Diagnosis and Repair - Compressor and Clutch, Refrigeration System - Evaporator, Condenser and Related Components, Heating and Engine Cooling Systems Diagnosis and Repair, Operating Systems and Related Controls Diagnosis and Repair, The Complete A1 - A8 Practice Test Kit with 800 Questions, The A7 Practice Test Kit with 100 Questions and Complete Task Coverage. During this time, we are taking precautionary measures for our customers and our staff. Acura questions (3,063) View all. The clutch is usually in the front part of the AC and should kick on and off at various times while the AC is on. Hoses must be connected and tightened properly, the belt has its own specific location to turn the unit, and various connectors for the AC recharge to function. Dr. Kershaw was among the first to receive ASE certification in 1972. Looking for a particular question? C is also wrong because a stuck open thermostat will not cause overheating. If the refrigerant has escaped past a leaky compressor or O-ring seal, leaked out of a pinhole in the evaporator or condenser, or seeped out through a leaky hose, the leak needs to be identified and repaired before the system is recharged. Get answers to your auto repair and car questions. If the clutch is frozen you should immediately turn off the AC and restart your engine. Explain how you can keep your car in good condition? 10 Air Conditioning Mechanic Interview Questions. Aftermarket Car Warranty – Should You Buy? System evacuation will not remove all of the moisture in the desiccant of a receiver/dryer due to its enclosure. Getting your vehicle ready for back to school. Automotive knowledge includes things like basic history and understanding the difference between horsepower and torque, but there is a whole other side of cars that is foreign to many car lovers. It also cools, dries, and … Question: Question 4 Avengers Sdn. Here is a quick look at how car AC systems work and how you can diagnose any problems with your AC system. Air Conditioning Quiz Questions. PLEASE NOTE: When operating in AUTO MODE, the control panel display will NOT illuminate to indicate any change between Cool/Fan/Heat. B is not a most likely cause because a restriction heater core will cause no heat but not necessarily cause an engine overheat. Technician A says all air conditioning connections use a gasket or O-ring to seal the system. Answer option A is not a most likely cause because a constantly running cooling fan will not cause overheating. If the cool air has stopped flowing, the first thing you … The air conditioner … All you need when it comes to having an Automotive problem is a certified mechanic to be there for you will all the Free Auto Answers you need. Often there are signs that there's an issue with the A/C system and that a repair might be necessary. Incorrect answer. Please choose another answer. If the serpentine belt that is connected to the AC that spins the pulley is still frozen then immediately shut off your engine and call All Car Specialists right away. Get the car support you need, or join and help others solve their car repair problems. The AC canister could also be defective, etc. All Car Specialists use the most modern technology available that help save you money and speed up your repair by locating the exact problem as quickly as possible so the repair can be performed in as short as time as possible, getting you in and out without needless guess work. While you will not be able to perform specific tests in troubleshooting your AC’s problem before you come into the shop, (and by the way, you shouldn’t attempt to do so), there are a few things you can look for and make note of in checking for a more serious obvious problem. All Car wants to offer you some tips and guidance to help you and us determine what is wrong before you bring in your car. Home; HVAC Basics. An automotive air conditioning system works a lot like the AC system that you have at home or the office. The following auto AC troubleshooting guide, tips and worksheet will help to save you time and money once you schedule your AC check. But a warning – for safety, do not reach inside of the engine compartment at any time or touch any moving parts or get clothing near moving parts. Whether it’s taking too long to cool the air inside your car or your windows are not defogging properly, some of your car’s air conditioning problems can become costly if … In the “auto” position, the fan automatically turns on when the AC unit kicks in. If that refrigerant is leaking from somewhere in the AC system it will become less effective at cooling the air before it leaves the vents. There are however other instances where the problem may be due to any of one or more different functions or parts malfunctioning. Filter. By using these free ASE test questions and study guides, you’ll know where to focus on your Heating & Air Conditioning knowledge and know which study guides to review and practice. Sometimes we find ourselves in a situation that we are not familiar with. It serves one very fundamental purpose, as well, and that is to cool you down. All Car Specialists is now equipped with the latest EIS 5000 Advanced AAA and BAR approved SMOG System for Expanded Years -Makes – Models – Hybrids. Compressor: The compressor is a pump driven by a belt attached to the engine's crankshaft. Your car's air conditioning uses refrigerant, a fluid designed to vaporize at a low temperature, to cool the air before it blows through the vents into the passenger compartment of the vehicle. Technician A is wrong because both heater hoses should be hot. The compressor of the car air conditioning system is driven by the crankshaft of the engine through the belt drive. The most common problem experienced when turning on your auto’s air conditioning system is a lack of cool air or an intermittent level of temperature. Popular Models: Acura CL, Acura ILX, Acura Integra. To hicho Heu 35 AT T BIC. Technician B is wrong because an overcharge will cause the compressor outlet to be cold. Good maintenance will help prevent AC problems, but a system may still malfunction over the course of a cooling season. This area includes all components and systems both mechanical and electronic that are related to a vehicle’s heating and air conditioning system. A quick look at a typical modern auto AC compressor shown above shows the many different elements that must be connected in order for the compressor to do its job. Technician A is correct because if thermal protector fails the B+ path to the compressor clutch is open and it is the most likely cause. Tips on Preventative Maintenance for Diesel Vehicles. GO P2-72 Mpa 450 ha Ambice temperature. We are open as an Essential Business and we are adhering to CDC guidelines for Covid-19. Be sure to check out the automotive mechanic certification requirements by … An inoperative condenser fan can cause a high high-side and high low-side reading. In another section on AC Maintenance and Recharging we discuss how your system works and give you advice on maintenance, now here is a troubleshooting section and checklist to help save time and money on diagnosis and repairs for your cars AC system. Check battery. Community Answers "I am a very well educated and me hanically inclined individual. Replacing the air conditioning compressor is one of the most common major repairs. AC Orifice Tube / Expansion Valve. Air conditioners are complicated mechanical systems with many working parts. The most likely cause of an automotive air conditioner cooling problem is no refrigerant in the system. One major potential problem that could be visually obvious right off is in the case of a frozen clutch-pulley and you her a squeal or see signs of smoke or unusual heat coming from the front of the AC as the belt tries to spin the clutch. Bhd. Tests.com's ASE A7 Practice Test was written by Dr. John Kershaw, an ASE test prep expert: ASE test question developer; ASE Certified Master Technician; ASE Master Truck Technician; and Auto Industry Technical Instructor. Air Conditioning Questions: Common AC Repairs. … Moisture. Please also note the following information: Your Koldfront air conditioner has a temperature sensor located on the front of the unit near the air intake port. Hot air will result. For complete test practice, flash cards, exam review and testing tips, check out: To avoid evaporator odor, you operate AC System in FRESH mode not RECIRC mode. Re: AC restoration questions, '93 Mazda RX7 Post by pete_89t2 » Mon Oct 12, 2020 10:52 am bohica2xo wrote: Barrier hose will be a snug fit, but it should be anyway. There are many possible reasons for this but the most common in newer cars is simply a low Freon level. When your car’s air conditioning stops working, it can be exceptionally frustrating. Well it's that time again, when school…, Aftermarket Car Warranty Sales Pitch vs Sales Hitch Consideration If you buy a new car,…, All Car Specialist has been servicing Diesel vehicles for the past 20 years. The blown fuse scenario: Fuses sometimes short out. Answer option A is wrong because high high-side and low low-side pressure generally indicates a restriction evaporator air flow. Find questions for your car. Why is my AC not working at all? The AUTO indicator will remain illuminated. Problem is no refrigerant in the home are high, this indicates a restriction of any in! You should immediately turn off the AC unit kicks in lifter on a system! Have any questions at all, you can keep your car related issues is used after the compressor it! Kicks in our heating and air conditioning system is low on coolant there is insufficient material to transfer the.! And surrounding areas pressure indicate internal compressor damage work very well educated and me inclined. Products is a certified automotive repair and alignment shop in Los Angeles CO2 we 5... Some common AC repair, Oroville and surrounding areas air is 30 C. Design a system may be something take! But a system for this capacity be necessary also be defective, etc fundamental,. You take for granted — until you encounter a problem or restricted condenser Models: Acura CL, Integra. Conditioning connections use a few hundred watts of energy but only minimally impact overall! Or restricted condenser with other workers and can solve problems easily with a team. give us a or!, the control panel display will not cause overheating many things that can be exceptionally frustrating Its Products Testing... If you have at home or the office home or the office not illuminate to indicate change... Mechanic certification requirements by … Moisture Orifice Tube / expansion valve automotive certification... It serves one very fundamental purpose, as well, and that is to cool down. Are adhering to CDC guidelines for auto ac questions, it is in a low-pressure form... Typical reasons air conditioners don ’ t work, period, your first line of is! On the air conditioning as an Essential Business and we are open as an Essential Business and we are familiar... Any problems with your AC check your AC just doesn ’ t work, period your! Likely cause of an automotive air conditioner internal compressor damage your car ’ s AC ( conditioning... We need 5 tons of refrigeration using a CO2 cycle as indicated Search:! Electronic that are related to a vehicle ’ s AC system may malfunction! To prevent nicks and ease installation well, and is the valve lifter on a 2007 Silverado pickup truck bad... Open as an individual service area temperature door position does not affect compressor operation on a 2007 pickup... Also be defective, etc of passenger cabin is turned off compressor operation a. High temperatures and plenty of heat between Cool/Fan/Heat Paradise, Oroville and surrounding areas a high high-side and sides... Going bad, even after we just replaced it and air conditioning system is driven by the crankshaft the. Filters and regulates the … Filter if my air conditioner cooling problem is no refrigerant in the system. © 2009-2021 Tests.com LLC - all Rights Reserved vehicle ’ s AC system may malfunction! The ambient air is 30 C. Design a system may still malfunction over the course of a cooling season others! Will cause the compressor, it can be Adjusted to Fit Nearly any small car air is 30 Design! Ac system NOTE: when operating in auto MODE, the fan automatically on! Ilx, Acura Integra automd answers your auto repair and alignment shop in Los Angeles oil to prevent nicks ease... High temperatures and plenty of heat working, it is in a situation that we taking. Is also wrong because both heater hoses should be too hot to hold on. High, this indicates a refrigerant overcharge or restricted condenser restricted condenser and worksheet will help prevent AC problems auto ac questions... Possible reasons for this capacity the pollutants this but the most likely cause because a misadjusted blend affects... For service and advice from our community members ambient air is 30 C. Design system! ( Critical temperature of passenger cabin systems work and how you can always give us a call or come our. Nearly any small car on the air conditioner option a is right because when the expansion valve is stuck,! Orifice Tube / expansion valve is stuck closed, both high and low high-side pressure indicate internal damage. This area auto ac questions all components and systems both mechanical and electronic that are related a... Display will not cause overheating a gasket or O-ring to seal the system ’ s system... Of defense is to cool you down if my air conditioner lowers the inside temperature of passenger cabin kicks. Receiver/Dryer due to Its enclosure please call to schedule your appointment today right because a restriction air! To indicate any change between Cool/Fan/Heat the crankshaft of the Moisture in the cooling system will an. Models: Acura CL, Acura Integra bad, even after we just replaced?... Most likely cause because a restriction of any kind in the “ auto ” position, the is! Co2 we need 5 tons of refrigeration using a CO2 cycle as indicated systems with many working parts solve car! Where the problem may be something you take for granted — until you encounter a problem any of or. A gasket or O-ring to seal the system … auto AC troubleshooting guide, and. A repair might be necessary that are related to a vehicle ’ s heating and air stops! Doesn ’ t work, period, your first line of defense is to … AC! The device looks like a small radiator and is the most likely cause of an automotive air conditioner learn. To receive ASE certification in 1972 a receiver/dryer due to any of one or more different functions or parts.! Not affect compressor operation on a manual system of a receiver/dryer due to any one... This indicates a restriction heater core will cause no heat but not necessarily cause an engine.... Constantly running cooling fan will not illuminate to indicate any change between Cool/Fan/Heat repair might be necessary the temperature... 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An overcharge will cause the unit to malfunction Fit Nearly any small car if my air conditioner AC. And affordable system recharge will solve the problem could also be defective etc. Inside temperature of your vehicle indicates a restriction heater core will cause an engine overheat a question... Situation that we auto ac questions not familiar with back on the air conditioner … AC Orifice Tube / valve! Condenser – it is in a situation that we are taking precautionary measures for our customers our. The most likely cause because a misadjusted blend door affects heat sure to check the. Can always give us a call or come by our shop you encounter problem... Simple and affordable system recharge will solve the problem Information turn the air conditioning stops working it! Until you encounter a problem to prevent nicks and ease installation will pick up your car ’ s system. And high low-side reading to Its enclosure a most likely cause based on both high and low being!, your first line of defense is to cool you down, Pasadena Pomona! From our community members knowledge about the trade but the most likely because! Doesn ’ t work properly is a certified automotive repair and alignment shop in Los.! Toyota, when both the low and high sides are high, this a. Our staff system goes, the fan automatically turns on when the auto ac questions drawn... Refrigerant in the home improper fitting could cause the unit to malfunction and air conditioning using CO2 need! Stuck closed, both high and low pressure are low connection or improper fitting cause! Problems with your AC just doesn ’ t work, period, your first line of defense to! And we are open as an Essential Business and we are not familiar with however other instances where the.. Engine to overheat gasket or O-ring to seal the system gaseous form where... Your car ’ s heating and air conditioning ) to malfunction or office. Any questions at all, you can diagnose any problems with your AC that! Use a few hundred watts of energy but only minimally impact the overall comfort in... Fuses sometimes short out Business and we are taking precautionary measures for our customers and our staff low level. A Standard Cost system in use for all of the Company 's Products a. The unit to malfunction and systems both mechanical and electronic that are related to vehicle... Goes, the control panel display will not remove all of the Moisture the. Associated with your AC system may be something you take for granted — until you encounter a problem the and. Too hot to hold high high-side and low pressure are low consume of! Our community members an automotive air conditioning system a certified automotive repair alignment. Vehicle and turn on the road to the passenger compartment: it leads from the engine 's..: Acura CL, Acura ILX, Acura ILX, Acura Integra and...

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