An automotive air conditioning system works a lot like the AC system that you have at home or the office. The AC orifice tube / expansion device filters and regulates the … 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. Hot air will result. Car Questions? Dr. Kershaw was among the first to receive ASE certification in 1972. If the clutch is frozen you should immediately turn off the AC and restart your engine. auto air conditioning troubleshooting guide. 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. All-Car…. Auto AC Repair. 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. 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. Below are some common AC repair issues and their fixes: Refrigerant leaks. Faulty compressor clutch: If the clutch is not engaging with your compressor, than your compressor can’t maintain the correct pressure. The AUTO indicator will remain illuminated. Use the key to start the car and … There are many things that can cause your car’s AC (air conditioning) to malfunction. The following auto AC troubleshooting guide, tips and worksheet will help to save you time and money once you schedule your AC check. 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. AC Orifice Tube / Expansion Valve. Car Questions and Answers . 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. All Car Specialists is a certified automotive repair and alignment shop in Los Angeles. Good maintenance will help prevent AC problems, but a system may still malfunction over the course of a cooling season. When that occurs we tend to lok to someone with experience for answers. The clutch should not be engaged when the AC is turned off. Who is right? Question: Question 4 Avengers Sdn. Get the car support you need, or join and help others solve their car repair problems. If you live within 5 miles, we will pick up your car for service. Answer option A is wrong because high high-side and low low-side pressure generally indicates a restriction evaporator air flow. Technician B is wrong because temperature door position does not affect compressor operation on a manual system. There are however other instances where the problem may be due to any of one or more different functions or parts malfunctioning. The next time you have questions about your heating and air conditioning system or home maintenance issues in general, remember Experts In Your Home. Community Answers "I am a very well educated and me hanically inclined individual. An inoperative condenser fan can cause a high high-side and high low-side reading. 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 … 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. 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? Most fans use a few hundred watts of energy but only minimally impact the overall comfort level in the home. 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 B is wrong because an overcharge will cause the compressor outlet to be cold. Our heating and air conditioning experts serve Chico, Paradise, Oroville and surrounding areas. Fast Testing and Certificates Serving San Gabriel, Arcadia, Pasadena, Pomona, Monterey Park, Monrovia, Temple City, Rosemead. 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. We are providing: Please call to schedule your appointment today! Copyright © 2009-2021 Tests.com LLC - All Rights Reserved. When the expansion valve is stuck closed, both high and low pressure are low. An air conditioner lowers the inside temperature of your vehicle. Manufactures Auto Accessories. ASE defines heating and air conditioning as an individual service area. 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. We'll start with the high-pressure side as it leads from the engine to the passenger compartment:. Aftermarket Car Warranty – Should You Buy? … Moisture. Why should we hire you? Answer option A is not a most likely cause because a constantly running cooling fan will not cause overheating. C is also wrong because a stuck open thermostat will not cause overheating. 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. 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. Car air conditioning using CO2 We need 5 tons of refrigeration using a CO2 cycle as indicated. … 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. Compressor: The compressor is a pump driven by a belt attached to the engine's crankshaft. 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. Acura questions (3,063) View all. Explain how you can keep your car in good condition? Condenser – It is the device looks like a small radiator and is used after the compressor as it provides condensing i.e. I learn very quickly and am eager to perform well, and gain knowledge about the trade. Get answers to your auto repair and car questions. Popular Models: Acura CL, Acura ILX, Acura Integra. Courtesy of Toyota, When both the low and high sides are high, this indicates a refrigerant overcharge or restricted condenser. 10 Air Conditioning Mechanic Interview Questions. The air conditioner … Tips on Preventative Maintenance for Diesel Vehicles. Collecting Initial Information Turn the air conditioning on while the car is running. We are open as an Essential Business and we are adhering to CDC guidelines for Covid-19. The AC canister could also be defective, etc. 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. Home; HVAC Basics. If the cool air has stopped flowing, the first thing 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. Sometimes we find ourselves in a situation that we are not familiar with. 8°F) (Critical Temperature of CO) Temperature of passenger cabin. Car Questions. Technician A is wrong because both heater hoses should be hot. Air Conditioning Questions: Common AC Repairs. Replacing the air conditioning compressor is one of the most common major repairs. Air Conditioning Quiz Questions. One of the typical reasons air conditioners don’t work properly is a clogged or dirty filter. If you have any questions at all, you can always give us a call or come by our shop. Courtesy of Toyota. 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. 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. 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. Here is a quick look at how car AC systems work and how you can diagnose any problems with your AC system. B is wrong because high low-side and low high-side pressure indicate internal compressor damage. 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. If your AC just doesn’t work, period, your first line of defense is to … 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. Air conditioners are complicated mechanical systems with many working parts. The compressor of the car air conditioning system is driven by the crankshaft of the engine through the belt drive. Identifying the Issue Start the vehicle and turn on the air conditioner. B is not a most likely cause because a restriction heater core will cause no heat but not necessarily cause an engine overheat. During this time, we are taking precautionary measures for our customers and our staff. 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. Technician A is right because a misadjusted blend door affects heat. 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. Please choose another answer. One Of The Company's Products Is A Set Of Seat Covers That Can Be Adjusted To Fit Nearly Any Small Car. 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. It also cools, dries, and … System evacuation will not remove all of the moisture in the desiccant of a receiver/dryer due to its enclosure. It serves one very fundamental purpose, as well, and that is to cool you down. When the refrigerant is drawn into the compressor, it is in a low-pressure gaseous form. Often there are signs that there's an issue with the A/C system and that a repair might be necessary. Why is my AC not working at all? I also work very well with other workers and can solve problems easily with a team." 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. Ask an Automotive Expert. A stuck expansion valve is the most likely cause based on both high and low pressures being low. 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. Feel free to ask automotive related questions and get the answers to all your car related issues. To hicho Heu 35 AT T BIC. The Company Has A Standard Cost System In Use For All Of Its Products. Regular check-up of parts like. With power and a ground, the clutch should have worked unless the gap is too wide, and is the most likely cause. 2. Technician B says when replacing O-rings you lubricate the O-ring with the correct refrigerant oil to prevent nicks and ease installation. 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. The cabin temperature need to be at 23 C and the ambient air is 30 C. Design a system for this capacity. The most likely cause of an automotive air conditioner cooling problem is no refrigerant in the system. Ask a mechanic for help and get back on the road. Questions by Make. Filter. Technician B is right because the upper radiator hose should be too hot to hold. If the fuse associated with your A/C system goes, the power to certain parts will stop. 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. 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 automotive air conditioning systems are (nearly) closed loops with a high-pressure side and low-pressure side. 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. All Car Specialists is now equipped with the latest EIS 5000 Advanced AAA and BAR approved SMOG System for Expanded Years -Makes – Models – Hybrids. A specific engine temperature is needed to consume all of the pollutants. Why is the valve lifter on a 2007 Silverado pickup truck going bad, even after we just replaced it? 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. Your car’s AC System may be something you take for granted — until you encounter a problem. When your car’s air conditioning stops working, it can be exceptionally frustrating. Looking for a particular question? GO P2-72 Mpa 450 ha Ambice temperature. 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. Find questions for your car. AutoMD answers your auto repair questions by giving free help and advice from our community members. The following auto AC troubleshooting guide, tips and worksheet will help to save you time and money once you schedule your AC check. Are auto ac questions indicates a restriction heater core will cause no heat but not necessarily cause an engine.! For our customers and our staff or improper fitting could cause the unit to.... 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