Link,
I wouldn't advise using the Honeywell model you purchased. I tried to switch over to a Honeywell last month. Thought I had it hooked up right, and the AC worked great. But when I switched over to heat, I got nothing. After about 30 minutes of waiting for the heat to kick on, I checked the thermostat and it was
very hot! Pulled it off the wall and it cooled down (eventually). Hooked it back up the next day, and found out the system was dead, and there was a scorch mark on the back of it. Removed the Honeywell and reinstalled the original Mach analogue T-stat; system still dead. Enlisted the aid of another well-known JOF member (who knows considerably more about trailer electrical systems than I do), but he was stumped too. Finally opened up the JOF web page, did a search for "Digital Thermostat", and found the solution:
Furnace Reset Switch had tripped. Took a few minutes to find the switch, but once I toggled it back to on, the light came back on and so did the furnace & AC.
Took the Honeywell back to Home Depot, and plan to order the Coleman Mach in the next couple of days. Yea, its a few $ more than the Honeywell ($60-$65 on Amazon vs. $30 for the Honeywell), but - based on Amazon customer reviews -
I know it will work. Based on my experience, I'd advise you to stick with the Coleman Mach digital. It's an exact color-for-color swap-out!
JMHO!