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: Getting various error codes

Sounds like you have several things going on. The first code P0220 is usually set because of a variance in voltage. This is sometimes due to a loose ground connection. A mechanic should be able to look up power and...

Q: grinding noise while turning right or driving straight

Hello. If the noise is still there when the engine is off and if you are not turning the wheel, then it is typically either a failing bearing in the rear differential or it can be a failure in the...

Q: Water leak on the passenger floorboard w/defroster and AC running.

If the leak does not contain any antifreeze or other "engine coolant" AND the leak is not due to A/C condensate backing up (if the A/C is working, just check for flow of condensate onto the ground or if this...

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 Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.