Q: A/C blows hot air - completely stumped after a number of repairs...

asked by on

I have an 03 TB EXT LT. Dual climate control - digital. A/C blows warm air. If it's 90+ degrees out, it blows around 80 degrees from the vent. The entire way on my 45 minute commute to/from work. We have verified the following: Acuators are working. Low pressure control switch was working. Fuses and relays are working. External temp readings are fine. Blower is fine. Fan clutch was working. Radiator working and coolant levels perfect. We added some Freon after finding it low but no change in temp. Idled for 20 minutes, low pressure a/c do not get cold. We replaced the compressor and accumulator, then vacuumed out the Freon. Vacuum pressure held steady. Started adding Freon. After 1 can, low side was at 40 psi and high was at 285 with vent air reading 80 degrees. Started adding 2nd can when low spiked to 75 while high side dropped to 100. Temp actually rose to 90. We stopped adding Freon at that point as readings were off and we didn't want to damage anything further...

My car has 153000 miles.
My car has an automatic transmission.

It sounds like you did not replace the expansion valve when you replaced the compressor and accumulator. The condenser, evaporator should be flushed out also. You should remove and replace the expansion valve filter since it is clogged causing the high pressure and eventual A/C cut off. If you would like to have this resolved, a certified technician from YourMechanic can inspect your A/C system and perform the right repairs.

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
  1. Home
  2. Questions
  3. A/C blows hot air - completely stumped after a number of repairs...

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

Q: Q: The key won't turn in the ignition

There are several things that may be causing these issues. One place to start is the shift lever. There is a sensor that only allows the vehicle to be started if it is in park or neutral. Try shifting the...

Q: Struggles to stay running when I start it and only last about 15 seconds

There are many possible malfunctions that can cause a engine to stall. As long as the engine is in good mechanical condition, it comes down to the engine getting the correct air/fuel supply, a sufficient ignition to fire the mixture,...

Q: install ac in a no ac car

To convert a vehicle that did not originally come with air conditioning to a vehicle that does have air conditioning can be VERY difficult. I would only recommend doing this on maybe an older classic car. Starting at the heart...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...