Q: Air conditioning only blows hot air after having a blown and replaced fuse

asked by on

I accidentally shorted the wires in one of the vanity mirrors, after which all interior lights went out and the air-conditioning lost the ability to produce cold air.

I replaced the blown fuse (number F49, which is listed as being for the airconditioning ECU as well as the various courtesy lights) and the interior lights came back on, but the aircon still only blows hot air.

I looked at the fuses that according to the manual are related to the air-conditioning, but the ones I checked looked fine.

My car has 57000 miles.
My car has an automatic transmission.

Hi and thanks for your question. In the A/C circuit to the compressor clutch from the switch, there is an inline fuse. Check continuity from the switch to the clutch on the compressor. If you have high resistance or if the meter reads out of limits, then the wire has a break in it. Find the break and fix it. When shorting wires, electricity will find it least past back to the battery so check all of the circuits that relate to the connections that you accidentally shorted. If you need further assistance with the wiring, then seek out a professional, like one from YourMechanic, to diagnose the electrical issue in person and move forward with correct 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. Air conditioning only blows hot air after having a blown and replaced fuse

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: Won' start or shift

Hello. You have a wide variety of problems there. The ignition key not turning could be due to a faulty ignition cylinder. If you are having trouble getting the car in gear and the engine will just revs up when...

Q: Hi I had a friend replace my motor mounts on my 2004 Pacifica v-6. Apparently getting them in and out were difficult.

Hi there. The leaks from the transmission could have came from the oil pan. When using a jack to lift up the engine, if the jack was sitting on the transmission oil pan, it probably cracked the pan, or the...

Q: Belt broke and pulley loose

Hello. If the A/C compressor pulley is loose, it could cause the belt to brake. A check of all the drive belt pulleys would need to be done in order to ensure that none of the other pulleys have caused...

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.