The blown fuse scenario: Fuses sometimes short out. AC Orifice Tube / Expansion Valve. Condenser – It is the device looks like a small radiator and is used after the compressor as it provides condensing i.e. 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. Auto AC Repair. GO P2-72 Mpa 450 ha Ambice temperature. All Car Specialists is a certified automotive repair and alignment shop in Los Angeles. Check battery. Good maintenance will help prevent AC problems, but a system may still malfunction over the course of a cooling season. 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. 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. Technician B is right because when the system is low on coolant there is insufficient material to transfer the heat. Who is right? … Car air conditioning using CO2 We need 5 tons of refrigeration using a CO2 cycle as indicated. Answer option A is not a most likely cause because a constantly running cooling fan will not cause overheating. ASE defines heating and air conditioning as an individual service area. Please choose another answer. When your car’s air conditioning stops working, it can be exceptionally frustrating. Technician B is wrong because the high blower is controlled by the high blower relay not the resistor trio. Courtesy of Toyota. Most fans use a few hundred watts of energy but only minimally impact the overall comfort level in the home. C is also wrong because a stuck open thermostat will not cause overheating. The cabin temperature need to be at 23 C and the ambient air is 30 C. Design a system for this capacity. Identifying the Issue Start the vehicle and turn on the air conditioner. 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 B is wrong because an overcharge will cause the compressor outlet to be cold. Technician A is wrong because both heater hoses should be hot. 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. Technician B is right because the upper radiator hose should be too hot to hold. Why should we hire you? B is not a most likely cause because a restriction heater core will cause no heat but not necessarily cause an engine overheat. I also work very well with other workers and can solve problems easily with a team." Car Questions? The following auto AC troubleshooting guide, tips and worksheet will help to save you time and money once you schedule your AC check. Technician A is right because a misadjusted blend door affects heat. Moisture. 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. Filter. Air Conditioning Quiz Questions. How can I tell if my air conditioner is broken? With power and a ground, the clutch should have worked unless the gap is too wide, and is the most likely cause. 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. The AC canister could also be defective, etc. 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. 8°F) (Critical Temperature of CO) Temperature of passenger cabin. The Company Has A Standard Cost System In Use For All Of Its Products. Air Conditioning Quiz Questions Answers ) Search for: Related Pages. 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. We'll start with the high-pressure side as it leads from the engine to the passenger compartment:. 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