Skip the auto shop - Our mechanics make house calls

Q: Only getting luke warm heat out my vents

asked by on

i'm getting no hot air out of any vents, I replaced water pump, themostat, blower motor, and both blend door actuators still no heat. both hoses going to heater core are hot and heater core lines under are hot. any ideas

My car has 147000 miles.
My car has an automatic transmission.

A: Hello. The heater is a part of the vehicle&...

Hello. The heater is a part of the vehicle's cooling system and uses the same fluid. The first thing I would do is check to make sure that the system is properly filled and bled. If any air gets trapped in the system it may prevent the heater from functioning properly. If the coolant level is low, there may not be enough reaching the heater hoses and heater, providing only luke warm air as a result. Similar symptoms can also be caused by a stuck thermostat or a faulty heater control valve, if coolant flow to the heater core is disrupted. I would start with checking the cooling system level and going from there. If you need help with a diagnosis before moving on with repairs, a certified professional from YourMechanic can come to your home or office to inspect the cooling system to pinpoint the problem for you.

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・Save up to 30%

Get a quote

What others are asking

Q: Car will not turn off - 1991 Jeep Grand Wagoneer

Q: What is knocking noise?

Hello, thanks for writing in about your Dodge Ram 1500. If you pulled the cylinder 4 plug wire and the noise got quieter then this is an indication that you have a bad rod bearing or piston pin on the...

Q: Heater blower stopped putting out heat.

If the blower doesn't work at all (i.e. it doesn’t blow warm OR cool air) then the problem is likely with the blower motor or its circuit. Blower motor control can be complex on late model vehicles, especially European ones,...

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 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...