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-   -   no heat, blower motor works when jumped (

jaydubbz1019 01-30-2011 02:49 PM

no heat, blower motor works when jumped
i have a 99 dodge 2500 and the heater was working off and on. now has completely stopped. i jumped the blower motor and it is working but i'm not getting a change from the knobs just one constant flow of warm air.all the settings for floor, defrost, ect. work. any ideas what the problem is and how to fix pls?

AJ1500 01-30-2011 06:02 PM

sounds like the speed reastat is bad, that controls your different speeds
I'm not sure where it is but it's prob close to the motor. what you want to do is find it then check it for getting power from the fan switch in all speeds, if you have power then the reastat is bad. if no power is coming to it then it may be the switch

of course you have checked fuses,, right?

jaydubbz1019 01-31-2011 06:33 AM

yes i have check the fuses. are you talking about the resistor?

AJ1500 01-31-2011 08:06 AM

Yeah I meant resistor, if the power is working to it at all speeds from the switch but not leaving it then it is bad
if there is no power then you have to back up towards the switch
also make sure your grounds are good, somtimes grounds can do weird things

panhead 02-06-2011 11:16 PM

The resistor is located underneath the dash, by the blower motor.

GTyankee 02-07-2011 12:35 AM

troubleshooting help can be found watching the HEATERTREATER videos

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