Skip the auto shop - Our mechanics make house calls

Q: Dual air control blows very hot on passenger side and warm on driver's side. Replaced the actuator with n/o change. Ideas?

asked by on

This last summer our Suburban's (2004) a/c stopped working and it only blew very hot air on the passanger side (dual controls) and warm air on the drivers side. Now that the weather is changing heat is not really working too well (mild warmth). We replaced actuator with no change. We can change the temperature settings, turn on and off the a/c, change the fan speed all with no apparent change in temperature.
My car has an automatic transmission.

A: Hi there. It would appear that your vehicle...

Hi there. It would appear that your vehicle has a combination of problems with the HVAC (heating, ventilation, air conditioning) system. Your vehicle having dual zone climate control means there are two temperature blend door actuators.

Replacing components without diagnoses can be expensive and time consuming without resolution. It could be a faulty A/C control panel not changing actuator position.

The inoperative A/C could be any number of issues, from a faulty A/C compressor, to an A/C system needing service, etc.

No heat could also be from any number of issues from a restricted heater core, to an engine not getting to operating temperature, the thermostat is stuck open, etc.

I recommend having your vehicle’s inoperative HVAC system diagnosed and repaired by a certified technician, such as one from YourMechanic, so that this can be correctly addressed.

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

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: Battery grounded power wire - 1980 Chevrolet C30

Your first starting effort probably created enough heat within the starter motor to melt the windings, shorting them. This just causes more power to be directed to an already hot starter motor. Kills the starter. Take it out and have...

Q: I had just two ignition coils replaced recently do all of them have to be replaced

Hello. Ignition coils will generally only need replacement if their faulty. If you aren't noticing any misfire or have anything specifically pointing to a bad ignition coil then you should not need to replace them. Although testing with a multimeter...

Q: Oil in my radiator, but the car is not overheating

You could be right, it could be that the oil cooler for the automatic transmission is leaking into the radiator. That could easily be repaired by replacing the radiator. Unfortunately, it could also be a head gasket or a timing...

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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
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.