after removing the resistor, I found it packed with leaves. Surprised it did not catch fire. I then removed the fan and sucked out all the leaves and used my hand to clean the evaporator face. There is still some debris in the vanes. I think I can pressure wash it out from the other side after removing the housing. The resistor looks good no burn marks. Should I still get a new one?
Thanks

 

you can test it with an ohm meter. but if i have to take it out, i usually just replace it. a new one is under $20

 

to test, put one lead of the ohm meter to one of the terminals .then from the inside touch each resistor lead. you will get a different reading from each terminal. if one does not read, than the resistor is bad.

 

Where is a good source. Napa Wants 44.00 for one Summit 19.00 but not on hand

 

i did not see what truck it is for so i just looked up 85 F350. part # E3TZ-19A706-B
rock auto. 16.57 for motorcraft. unit.
for parts giant, $18.64 for motorcraft unit.
https://www.fordpartsgiant.com/parts/ford-resistor-asy_e3tz-19a706
tasca ford, $18.97 for motorcraft unit.
https://www.tascaparts.com/oem-parts/ford-resistor-asy-e3tz19a706b

 

Where is a good source. Napa Wants 44.00 for one Summit 19.00 but not on hand

Thanks this is very helpful

 

The resistor is bad. replace it

 

Ok the AC is working at 100 % Nice and cold lots of air flow. Removed about 4 hand full of leaves and other stuff and then washed out evaporator. I did it all from the fan side. Now on t the fuel gauges. see new post Thanks on this one