potroastman
New Member
I have a Honeywell EMM-3 which is a 3 zone hvac controller. I was troubleshooting a thermostat problem today and looking at this circuit board. It turned out to be a thermostat issue so everything is fine now. But I noticed on the EMM3 one of the resistors was quite hot to the touch, and slightly browned around the edge. Laser thermometer says it is about 160 degrees F.
Should I replace this thing or is this 'normal' to have some heat on this part? It's been working fine, and is from 2007.
Should I replace this thing or is this 'normal' to have some heat on this part? It's been working fine, and is from 2007.
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