A little different blower problem '03 Pathfinder

[k0tlg]

I have read the very informative thread on the dead blower motor problem and the fan control amp module that causes the problem. I had the problem and replaced the module, it worked for 30 minutes and then died again. I have discovered that the thermal cutoff opened up.

I have bypassed the cutoff and the blower works again however the heat sink gets too hot to touch in just 10 minutes of operation. I really don't think that the mosfet should run that hot and I am concerned that I might burn up some wiring.

Can anyone shed some light on this?

Thanks
Tom G.

[ARKQX33V6]

Motor is too hot, too much current, check regulator, thermal resistances and connections. Measure input voltage.