Aircond most of the time blows cold air but "sometimes" w...

Q: Aircond most of the time blows cold air but "sometimes" warm

asked by on November 20, 2017

I had my aircond cooling coil replaced due to a leak 2 years ago. Since then it was A cold. Recently my aircond blew warm air at cold start and took a while at least 5 mins to get the cold air flowing or once driving but there would also be a time where it would randomly blow warm air somtimes . Im pretty sure theres no leaks since it was inspected when i had my aircond repaired and had necessary items changed except the compressor. What could be the problem here? Could it be the compressor or what?

If the last inspection of the system was two years ago, it is possible for a leak to have developed since then. The only way to rule out a leak is to sweep the system with an electronic leak detector. If, and once, there are no confirmed refrigerant leaks, and the refrigerant gauge pressures, high and low side, are checked and found to be normal, intermittent blowing of warm air is commonly due to premature compressor shut down (or "short cycling"), which in turn could be due to a faulty compressor clutch or something like high head pressure that activates the high pressure cut-off switch (in turn due to a possibly blocked condenser or non functioning condenser cooling fans) or, another possibility is an internal blockage at the expansion valve in the evaporator. Trapped moisture, that intermittently freezes and thaws at the expansion valve, can also cause the symptom you are describing, particularly if the system dryer was not replaced when the system was serviced two years ago. Regardless of the exact cause of the present problem, the cause can absolutely be pinpointed and resolved if you request an air conditioning system inspection. If you have further questions or concerns, do not hesitate to re-contact YourMechanic because we want you to make the most of your repair dollars and help you to get the best possible results.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

When I drive the mileage on my car does not change

Hi There, This could be related to a couple of possibilities. The [instrument voltage regulator]((https://www.yourmechanic.com/services/instrument-voltage-regulator-replacement) regulates the voltage supplied to the various gauges in your vehicle’s dash. When this is not working properly, this may cause the gauges in your...

I HAVE A 2002 ALERO OLDSMOBILE IT HAVE 3 CODES DO U KNO WHAT IT CAN BE IF I TELL U THE CODES

Misfire codes can be caused by a range of failures. Spark Plugs, Coils, Injectors, Manifold gaskets could all be suspect. When the check engine light is on and the car has stored codes, your first reaction is to replace the...

dealing with the dealership

A pre-purchase vehicle inspection is a good idea. That inspection, carried out by a certified Mechanic from YourMechanic, dispatched to your location, will give you very specific data regarding any current problems that the car has. These independent, third party...

Related articles

How to Replace an ABS Speed Sensor
The Anti-Lock Braking System uses speed sensors to make sure your wheels are synced when braking. Most modern cars are equipped with this sensor.
How to Create a Bill of Sale for Selling Your Car
A bill of sale is especially important when selling high-value items like used cars. You will need a computer, printer, photo ID, and a notary public.
How to Lower Your Car Loan
Paying off a car loan is a long process that requires you to remain dedicated to your budget as you pay your monthly bills. Sometimes, though, whether through access to extra cash to make extra payments, refinancing of your current...