Skip the auto shop - Our mechanics make house calls

Q: My actuator works backwards

asked by on

When I my air on vent, the defrost works. when I turn it to defrost, the vent works. Please help!! I have a 2000 Chevy Suburban K1500

Hello. We will need to observe several other factors in order to pinpoint what the issue is. When you say you are turning on the vents, what setting are you turning on when this happens? Is it all temperature settings that turn on defrost? This may help us determine if this is a blend door issue, switch issue, or other electrical issue.

It’s common procedure that the air condition system be turned on when the system is set to defrost to help dehumidify the air. If this is what is happening, and an unusual amount of cold air is being blown through the vents, you may be experiencing a blend door issue.

If it doesn’t matter what setting you are trying to run, the issue is very likely a switch or wiring problem. You will want to have the wiring inspected for a short somewhere that is giving the other components power when it should be. While testing the switch may be a little harder, but can be done. Keep in mind with the time it takes a technician to diagnose the switch, you may have been able to pay for a new switch to be installed.

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
  1. Home
  2. Questions
  3. My actuator works backwards

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: Replaced timing belt about 2 days later set a code P2649 rocker arm actuator control circuit high bank 1 where is this part? 2003 Honda Accord

Hello - the P2649 error indicates a failure of the actuator circuit for the variable rocker arm mechanism. This mechanism changes valve opening for the engine, improving power and fuel efficiency. It is operated by engine oil pressure and a...

Q: Misfire cylinder 1

Hi There, A misfire can be caused by many different things other than faulty spark plugs and can develop for a variety of reasons. Generally a misfire will fall into one or both of two categories: Fuel and/or spark. Spark...

Q: huge oil leak honda accord

The flatness of the block (and heads EVEN if they are "new") has to be measured. If the block was warped, that is if the block is not perfectly flat across the entire surface to within .002 inches, the assembly...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...
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.