heater switch please help

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heater switch please help

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heater switch please help - 12/4/2007 4:09:10 PM

05colorado

Posts: 1
Joined: 12/4/2007
Status: offline

i have a 2005 chevy colorado, today my heater blower switch quit working on all settings except for #4 the highest ?? does anyone know what it might be, ex: the switch or motor control or the blower or what? id really appreciate any ideas on what it might be or what to do to figure it out so i can get it fixed really quick its really cold this time of year. It does heat up and does blow on #4 but not any other settings. thanks spencer.

Post #: 1

RE: heater switch please help - 12/4/2007 4:43:12 PM

John86

Posts: 254
Joined: 2/16/2007
Status: offline

sounds like the blower motor resistor is either burnt up or the blower motor resistor harness. i've replaced a few of those that have gotten hot and melted the terminal at the connector. usually u have to replace both harness and resistor.

(in reply to 05colorado)

Post #: 2

RE: heater switch please help - 12/4/2007 10:10:01 PM

Scoper50

Posts: 67
Joined: 10/14/2007
Status: offline

9 times out of 10 it will be your blower motor resistor. Very simple fix.

(in reply to John86)

Post #: 3

RE: heater switch please help - 12/10/2007 9:46:02 AM

mpkeon

Posts: 3
Joined: 11/28/2007
Status: offline

i replaced the resistor 2x and now the dealer wants to diagnose the truck, why does it keep overheating the resitor. i found that the harness actually wiggles loose because of gravity. just a poor design. try wiggling the harness on the resistor with the selector on 1,2 or 3, bet it starts.

(in reply to Scoper50)

Post #: 4

RE: heater switch please help - 11/22/2008 11:26:30 AM

tplow10

Posts: 1
Joined: 11/22/2008
Status: offline

i have the same problem i think i pulled the resistor, how do i test it or tell it may be bad

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