Coleman mach ac

[1Cruzin]

[B]I Recently attempted to disconnect the analog Thermostat in my unit and install a Digital Thermostat made by Honeywell. Somehow I must have blown a fuse or something. I disconnected the new "stat" and reinstalled the older analog unit and my AC is not working. I am confident that the wiring is correct. Need help to begin the process of elimination and determine why AC is not coming on. It worked perfectly until I began messing with it.

[Fr8Train]

Lesson 1:if it ain’t broke don’t fix it!

[Grumpy]

Check the fuse for the furnace.

[che57vy]

The fuse on my Greyhawk was on the 12v feed wire down in the wall behind thermostat located in a square fuse holder

[1Cruzin]

Thank you Grumpy. I checked all of the 12 volt fuses and they were solid. Not sure where the furnace fuse is but will give that a look once I find it. I forgot to mention that when I was switching faceplates from old to new, the Red 24V DC Positive wire accidentally touched the Blue 24V DC Negative wire. Had a slight glow for a second. If it blew a fuse I would have found it.

I did switch back to the original analog "stat" and I get nothing when switching the to Cool. This is a tough one.

[1Cruzin]

Originally Posted by che57vy

The fuse on my Greyhawk was on the 12v feed wire down in the wall behind thermostat located in a square fuse holder

Awesome.....I would have never looked there and I will check it tomorrow morning first thing. I'll bet that you are correct cuz I've checked everything else. Thanks a bunch for your input.

1Cruzin

[1Cruzin]

My wife and I were excited by your post. We got up first thing this morning went to the RV, opened the access hole that you described below the Thermostat to find nothing but pipes and shower stuff. I looked for other access holes and came across nothing of importance. Here are some of the steps I have taken to troubleshoot this problem.

1. Checked ALL visible fuses with ohm meter checked continuity. All appear to be good.
2. Reconnected all wires with wire nuts.