Author Topic: 70 BARRACUDA HEATER FAN SPEED IS "HIGH" ONLY (Read 978 times)

70 Grand Coupe · « **on:** February 10, 2016 - 10:49:52 PM »

How does one troubleshoot the heater blower/fan only works on HIGH and not MEDIUM. Should I be looking at the fan motor or switch? Either/or, how does one check both with a volt meter?

Regards,

Darcy

Rich G · « **Reply #1 on:** February 11, 2016 - 12:11:43 AM »

Fan motor either works or it doesn't so its not the motor. You can ck for power at the switch or the resistor on top of the heater box. That's what controls the speeds.

FY1Cuda · « **Reply #2 on:** February 11, 2016 - 03:41:05 PM »

This has come up before.
http://www.cuda-challenger.com/cc/index.php?topic=110661.0

dodj · « **Reply #3 on:** February 11, 2016 - 06:13:57 PM »

Switch or resistors. Motor is good.

70 Grand Coupe · « **Reply #4 on:** February 11, 2016 - 08:36:53 PM »

I will check that tomorrow.......thank you gentleman

Regards,

Darcy

dodj · « **Reply #5 on:** February 11, 2016 - 09:03:09 PM »

The resistors look like springs. At least on a '73 they do.

Author Topic: 70 BARRACUDA HEATER FAN SPEED IS "HIGH" ONLY (Read 978 times)

70 Grand Coupe

70 BARRACUDA HEATER FAN SPEED IS "HIGH" ONLY

Rich G

Re: 70 BARRACUDA HEATER FAN SPEED IS "HIGH" ONLY

FY1Cuda

Re: 70 BARRACUDA HEATER FAN SPEED IS "HIGH" ONLY

dodj

Re: 70 BARRACUDA HEATER FAN SPEED IS "HIGH" ONLY

70 Grand Coupe

Re: 70 BARRACUDA HEATER FAN SPEED IS "HIGH" ONLY

dodj

Re: 70 BARRACUDA HEATER FAN SPEED IS "HIGH" ONLY