Heater doesn’t work?

[19kowalski70]

70 challenger everything seems to be hooked up. But my heater does not work. No blower motor or even any heat from the vents with it set to hot? Any thoughts thank you.

 

[terrywalker]

Air conditioning or not? Are the heater hoses getting hot/warm to the touch with engine at operating temperature and heater selected to on? With A/C, is the heater control valve in engine compartment operating. Are the doors inside heater box opening/closing? Is it a new heater core or an old plugged one? Just a couple of things to check.
Terry W.

 

[Chryco Psycho]

Are you getting power to the heater motor or the switch at the dash , possibly a blown fuse , you need to start tracing the circuit .
I asume the hoses are connected & the heater valve is working to provide water flow .

 

[19kowalski70]

Fuse is good, hoses are hooked up, I’ll check if the hoses are getting hot. As far as what I can see everything is there. It’s none a/c, there is not a valve under the hood

 

[19kowalski70]

Fuse is good, hoses are hooked up, I’ll check if the hoses are getting hot. As far as what I can see everything is there. It’s none a/c, there is not a valve under the hood. Blower motor does nothing, when I turn it to heat I get cold air from under the dash only. Thanks guys

 

[Chryco Psycho]

The blower motor has a 3 connector plug behind the glove box

 

[Challenger RTA]

The ground is through the motor mounting nuts in the engine compartment. Switch might be bad. Or as said above connections on switch or heater box bad. Resistor wire in heater box bad, not likely you should at least have high.
This is one of the other high current loads that should be feed independently by a relay circuit.