Air Conditioning Repair

FREE Car Air Conditioning Repair Question and Answers

The following facts about an air conditioning performance test are all true, EXCEPT for

Obstructions of the cabin air filter may cause insufficient air circulation.

Road debris can clog the condenser fins reducing system performance

To avoid outside odor, operate AC System in RECIRC rather than FRESH mode

Passenger-side floor being wet is one symptom of a clogged evaporator drain line

Correct! Wrong!

Explanation:
You should run the AC system in FRESH mode rather than RECIRC mode to prevent evaporator stink.

According to Technician A, when the condenser airflow is restricted, both the high and low lines are under high pressure. When the pressure is low on both the high and low sides, according to technician B, this is a sign of low refrigerant. Who is correct?

Technician B only

Technician A only

Neither Technician A nor B

Both Technician A and B

Correct! Wrong!

Explanation:
Both technicians are on the right. Toyota courtesy

Which of the following circumstances is most likely to result in a car overheating?

Restricted heater core

Thermostat stuck open

Clogged radiator

Electric cooling fan runs all the time

Correct! Wrong!

Explanation:
Because any limitation in the cooling system will cause an engine to overheat, a clogged radiator is the most likely culprit.

The technician observes that the compressor output is warm when testing the performance of the air conditioner. This is a typical condition, according to technician A. The air conditioning system, according to technician B, is overcharged. Who is correct?

Technician B only

Technician A only

Neither Technician A nor B

Both Technician A and B

Correct! Wrong!

Explanation:
The technician in A is right. Technician B is incorrect because an overcharge will result in a chilly compressor outlet.

Which of the following issues will result in the various gauge readings depicted in the illustration?

Low refrigerant

Expansion valve stuck closed

Restricted condenser airflow

Refrigerant overcharge

Correct! Wrong!

Explanation:
A refrigerant overload or a condenser with restricted flow is indicated when both the low and high sides are high. Toyota courtesy

The engine may run excessively cold, according to Technician A, if the thermostat is broken. The thermostat can generate a pinging or pounding noise if it is jammed closed, according to technician B. Who is correct?

Technician B only

Technician A only

Neither Technician A nor B

Both Technician A and B

Correct! Wrong!

Explanation:
The technicians are both correct.

If the condenser fan wasn't working, what high-side and low-side pressure gauge readings might a technician discover?

Both high-side high and low-side are high

High-side high and low-side low

High-side low and low-side high

Both high-side high and low-side are low

Correct! Wrong!

Explanation:
A high high-side and high low-side reading can be brought on by an inactive condenser fan.

FREE Car Air Conditioning Repair Question and Answers

The following facts about an air conditioning performance test are all true, EXCEPT for

According to Technician A, when the condenser airflow is restricted, both the high and low lines are under high pressure. When the pressure is low on both the high and low sides, according to technician B, this is a sign of low refrigerant. Who is correct?

Which of the following circumstances is most likely to result in a car overheating?

The technician observes that the compressor output is warm when testing the performance of the air conditioner. This is a typical condition, according to technician A. The air conditioning system, according to technician B, is overcharged. Who is correct?

Which of the following issues will result in the various gauge readings depicted in the illustration?

The engine may run excessively cold, according to Technician A, if the thermostat is broken. The thermostat can generate a pinging or pounding noise if it is jammed closed, according to technician B. Who is correct?

If the condenser fan wasn't working, what high-side and low-side pressure gauge readings might a technician discover?

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