Heater Fan, Only on High

[Dan B.]

Dash Heater Fan work only on high

Not sure if this is a switch or resistor yet. Can anyone tell me the best access to the heater blower/fan (see attached images)? It looks like it has to be from the cockpit. Second image is from the front of the firewall on PAX side.

2003 Monaco Windsor

Thanks Dan

IMG_4199.HEIC IMG_4200.HEIC

[jacwjames]

It might only be the resistor pack that is bad.  Mine is mounted outside accessed through the generator slideout.  Passenger side up high, it is mounted in the plastic covering over the evaporator.   Looks like this  https://www.napaonline.com/en/p/ECHBR309

Check the Parts list for a picture and part number, can be bought at most auto parts store. 

Edited December 2, 2023 by jacwjames

[Dan B.]

Sorry - maybe these are visible.

Dan

[Garry Donohue]

It’s in your photo, from the outside its the thing that the plug is into. 

[Dan B.]

Think you guy got it right. Replacement on order. Will follow up with results

Thanks for your help,

Dan

[Dan B.]

Heater blower repaired. BTW my part no. is Motorcraft D8BH-19A706-AB. I did find one on Ebay.

But in testing the resistor, I found that the thermal fuse had failed. All I did was purchase one (6 for $7.00) from Amazon. I removed the failed fuse and soldered in the new. The fuse is rated at 240C, 10A, 250V. Easy.

Thanks for your help - got me on the right track.

Dan