Skip the auto shop - Our mechanics make house calls

Q: HVAC vent selector switch isn't working. Replaced selector cable. Still won't switch.

asked by on

My vent selector switch is stuck on defrost. I opened up the housing unit and turns out the switch cable was broken. I replaced that with a new working one and the switch still won't move. I'm guessing the actual lever is stuck or there is debris near one of the vent doors keeping it from moving. I haven't gone any further than replacing the cable unit though.

My car has 127000 miles.
My car has a manual transmission.

A: If replacing the cable did not fix the is...

Hello.

If replacing the cable did not fix the issue then the problem is likely rooted elsewhere. If the lever does not appear to be broken it may just be stuck and needs to be unjammed and lubricated. It may also be possible, as you have suggested, that debris is jamming the vents, causing the entire lever and cable assembly to be stuck. I would recommend disassembling the switch / lever assembly to see if it is perhaps jammed or broken and going from there. This may require disassembly of the vehicle’s interior in order to access the components. If you’d like assistance in diagnosing and repairing this issue, a certified YourMechanic technician can be dispatched to your location to perform a heating/AC inspection.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Locks don’t all work, might be electric problem

The door latch assembly has a lock actuator as part of it. The complete assembly, except for a couple internal pieces, is made of plastic and doesn't last as long as it used to when it was made of metal....

Q: Just bought my car not to long ago with a decent amount of mods done, I cleaned the cold air intake filter and now it makes a pop.

When it comes to these cold air intakes and K&N type filters, the engine air flow is different than the original and your engine control module may not be able to correctly read the amount of air that the engine...

Q: Engine ticks on a 2006 Acura TL

The only ticking sounds that you generally get are either the valves are out of the adjustment, the lifters are bad themselves, or the fuel injectors are ticking. So get yourself a little stethoscope and listen around. Maybe it's...

Related articles

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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.