Q: Q: no heater

asked by on

My truck cab heater is not working I remplace all door actuates thermostat and fuse check the lines thy do get hot but no heat in cab please advice

My car has 188000 miles.
My car has an automatic transmission.

The lines to the firewall could be hot and yet the heater control valve is not admitting the heated coolant to the heater core in the dash. So, you want to inspect that valve and make sure it is moving in response to commands from the dash mounted controls. If the heater control valve works, and the blower motor functions, but only cold air blows, the only other possibilities are a plugged heater core or a blend door stuck such that no air blows over the heater core. If you desire that a certified mechanic inspect this issue and make the required repairs, the recommended diagnostic is a no heat diagnostic and that would be performed right at your location at any time that is convenient for you.

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. Q: no heater

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: Have no heat, I've took the thermostat out still no heat. Flushed the radiator couple times. Doesn't seem to be flowing n radiator

The complete cooling system should be drained and fresh clean water put in with a good quality radiator flush put in. Run the engine for at least 30 minutes at 1000 rpms with the heater in the on position but...

Q: Q: Struts and shocks

You do have front struts and rear shocks on your GMC Terrain. If you are having any problems with your suspension, or need replacement struts, a certified mechanic from YourMechanic can come to your home or office to service your...

Q: I have a 2016 ford f450 and the check engine light come on today with a bunch of codes. P0269, P0263, P0303, P0300, P0305, P0307,

Hi Josh. Thanks for contacting us today. It would be very helpful if you could let us know what symptoms you are having. This many codes typically indicates a fault with the ECU, so let us know what problems the...

Related articles

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 Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...