Heater wont blow heat blower runs but acts like heater box wont let heat come out heater core seems ok
I am a mechanic and auto-motive electrical systems technician, just a side note, currently while answering this question i am preparing to go complete a task of rewiring the entire electrical system in a Ford Sierra.
On this note i will ask are you only hearing the blower running or can you feel air coming out of the vents? If yes you may have one of the following problems as described below.
Some heaters are electric meaning they have a heating element just as what is found in domestic heaters while some others use the coolant from the radiator which carries the heat from the engine which flows through the core. In either case the blower blows air across/ through the core which in turn carries the heat to the cabin. In the case of an electric heater system check and see if you got any blown fuses, because most of the time the fuse for the heater is separate from the blower also check for any faulty relays.
In the case that your vehicle has the heater system that is operated by the heated coolant from the engine, you may have a clogged heater hose or heater core. The hose or core may become clogged as a result of debris, rust etc from the engine, heater core or radiator. In that case a system flush is required. To check for a clogged heater core, there at two hoses on the core, one is the inlet and the other is the outlet. Have the hose that is the outlet disconnected, then check and see if coolant flows out of that hose with a steady flow ( make sure to put a container to collect the coolant so it does spill on the ground, make note of the color and also look for debris/particles.
In a case where which ever of the system you have the heater is functioning, the next thing that can be the problem is a stuck shut blend door. The blend door acts just like a door would to close of the passage of air flow to the cabin. For further assistance please add your vehicle make and model.
Jan 19, 2016 |
Cars & Trucks