Skip the auto shop - Our mechanics make house calls

Q: Climate control no mode function?

asked by on

Mode actuator was not working changed it,still no function. Changed the climate control still no function. The part may be faulty. Heat and cold are upside down on the control. A/C does not come on although it did then I bypassed it. Parts purchased from aftermarket shop. I have taking values at the 24 pin connector plug, but don't know what they should be. The mode actuator has voltage to it but no ground. Before just the mode was not working now heat, cold, AC, and rear defrost don't work. I can unplug the climate control unit and get temperature to work but heat is in the blue section and cold is in the red section

My car has 200000 miles.
My car has an automatic transmission.

A: Hello, thanks for writing in. I'd be ha...

Hello, thanks for writing in. I'd be happy to help.

From what you describe it appears that your vehicle is experiencing some sort of electrical issue. It may be possible that the some sort of wiring problem has occurred, or that the components you replaced are defective. I would carefully inspect the vehicle for any wiring issues, though from what you describe, the unit operating in reverse, it is more likely that the component is defective. It is not uncommon for aftermarket components to be defective out of the box, so if you suspect the component may be defective, I would replace it. A wiring diagram can be sourced from either the dealership, or out of a quality service manual.

If you would like help inspecting the electrical components, consider having an expert automotive technician from YourMechanic come to your home or office to inspect and diagnose this issue for you, and make any repairs as needed.

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・Save up to 30%

Get a quote

What others are asking

Q: How to put fuel sender unit on new fuel pump

When it comes to installing aftermarket parts, my recommendation would be to have a mechanic come and take a look at it for you. Aftermarket parts do not always fit. Sometimes you have to remove the old pump from the...

Q: When engine warms up and goes in reverse, it shuts off

Hello there. This is a bit of a rare issue on the 1990 Chevrolet K2500. There are a few possible causes that come to mind with the issues going into reverse. The most common would be a shift solenoid, torque...

Q: Door not locking or unlocking

The actuator is the most likely cause of the problem; if the actuator is bad, it may prevent the door from locking, or unlocking. I recommend that you have a mechanic, such as one from YourMechanic, run an inspection to...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
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.