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Re: 1965 Chevy C10 - round knob, thrift heater only works on high
Woogeroo #1398042 Sat Feb 20 2021 03:05 AM
Joined: Feb 2002
Posts: 3,009
Socket Breaker
Xena - thanks for the troubleshooting tips!

-Woog

Re: 1965 Chevy C10 - round knob, thrift heater only works on high
Woogeroo #1398526 Tue Feb 23 2021 07:55 PM
Joined: Jul 2018
Posts: 113
X
'Bolter
Glad To help

Xena



Re: 1965 Chevy C10 - round knob, thrift heater only works on high
Woogeroo #1399229 Sun Feb 28 2021 02:02 AM
Joined: Feb 2004
Posts: 23,004
H
'Bolter
The reason the blower works on high speed is that there is a relay built into the system to bypass the resistor when the fan switch is in the "high" position. An open circuit in the resistor stack, or a dirty switch connection or burned/corroded wiring will disable the slower speeds.
Jerry


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Re: 1965 Chevy C10 - round knob, thrift heater only works on high
Woogeroo #1399453 Mon Mar 01 2021 05:34 AM
Joined: Jul 2018
Posts: 113
X
'Bolter
Thats what the troubleshhoting is all about. Unless the truck has air conditioning, there is no relay.

Last edited by Xena; Mon Mar 01 2021 02:41 PM.


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