I have removed the resistor pack. I have ordered a replacement. Should be
here in the next few days.
What identifies the resister pack as defective?
There are 4 coiled wires (resisters) in varying gauge (none burned open) and
there was a diode that looked OK.
How do you test this thing if it looks like there isn't an obvious defect?
Changed out the resister pack and the heater works fine on all blower speed
I still would like to know how I could test or identify what was wrong with
the old unit.
No burn through on any of the resisters, the diode did not look fried.
Connections looked okay and I had the old unit in and out a few times.
Thanks for your help.
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