Jul 31, 2014 - Personal    2 Comments

My Digital Honeywell Thermostat and the AC

Back in November, I upgraded from an analog Duoterm thermostat to a programmable digital Honeywell thermostat. This remains one of the best mods I’ve made to my RV.

This spring, I did my AC maintenance and testing before the weather got warm. The AC did not run correctly and made an awful sound. It took me a minute to think, “What changed between now and the last time I used the AC? Ah, the thermostat.”

It would have probably been faster to check my post from November, which I only just did, as it explains exactly what was going on with my AC!

But I figured it out on my own very quickly and before thinking I had any major AC issues.

The problem in November was that when I hooked up the wiring for the fan on the AC, it would run as soon as the furnace powered on. I disconnected this wiring and had no trouble with heating all winter.

So the possible solution to the AC not working was to open up the thermostat and reconnect the fan wiring. Sure enough, that did the trick!

My AC runs great and while I just about never use it, I’m grateful for it when it gets unbearably muggy in here, like tonight!

I don’t think that there’s a way around the fan issue other than  making a radical modification to the thermostat to add an off option in addition to on and auto. So I’ll just disconnect it when I need heat and reconnect it when I need cold, which should technically be once a year each…

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  • So you are done with the cold weather?

  • We’ve been done with the cold weather for a good long while. 🙂 We had a couple of cold ones in July, but they were the exception. Most days have been scorching. What’s new is that it’s also warm at night.

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