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-   -   heater stopped suddenly (http://www.ramforumz.com/showthread.php?t=70522)

grungybob 01-06-2011 10:35 AM

heater stopped suddenly
 
I have a 99 1500 4wd ext cab 5.2l the heater suddenly stopped, the engine temp is at normal operating range so i dont think its a coolant issue it seems to be a control issue. The dial control for the mode setting operates, it just has no effect and the fan speed knob operates with the same lack of doing anything. Anyone seen this or have any tips

RamTech 01-06-2011 11:56 AM

The blower is dead and the modes won't change?

grungybob 01-06-2011 01:26 PM

Yes all of a sudden nothing works, the back lighting for the controls is there but the switches/knobs do nothing. Like somebody pulled the plug

RamTech 01-06-2011 01:32 PM

Check and see if there is power at fuses 2 and 5 in the fuse panel with the key in the on position. if not, you may have an ignition switch/wiring problem in the column. Both the blower motor and blend door are fed from this circuit.

grungybob 01-06-2011 01:38 PM

I'll check it later, Thanks I'll let you know

rlsbee 02-13-2011 10:42 AM

Check the relay for the blower motor. It's in the the PDC under the hood. The part is really cheap and it's worth changing it before chasing a lot of stuff. If yours is like my '98 there is a relay for one of the other functions (sorry, I don't remember which one) which is the same part number as the blower relay. Swap it into the blower socket and check the blower.


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