Community Forums

Fishpcb · 02-18-2018, 08:01 AM

My ac works fine but lost the zone 2. Duo-therm 5 button shows only zone 1 now. I'm not sure when or what changed but both units still heat and cool but I can't control the zones.
Going to try the factory reset again and check connections to see if this helps.

Darrel · 02-18-2018, 08:46 AM

Additionally, your first AC has a row of mini switches that indicate whether you have multiple AC units. You could cycle these switches in case one of them has gotten dirty and causes the problem.

Have a nice day - Darrel

Fishpcb · 02-18-2018, 09:16 AM

Where would I find these switches?
I tried the reset and that didn't work. Also cleaned the cable connection and that didn't help.

MSHappyCampers · 02-18-2018, 09:29 AM

Just a couple of suggestions. First, when I had florescent lights in the MH, I found that if any were on that the 5-button CCC would not reset properly. Turn off ALL florescents before reset!

As you probably know, the thermostat communicates with the A/C's over a telephone-type cable and plugs. Over time the contacts on the plugs can develop a poor connection. Plugging and unplugging them several times will usually correct that!

Good luck, happy trails, and God bless!

BigSkyBob · 02-18-2018, 09:32 AM

Quote:

Originally Posted by MSHappyCampers

Just a couple of suggestions. First, when I had florescent lights in the MH, I found that if any were on that the 5-button CCC would not reset properly. Turn off ALL florescents before reset!

As you probably know, the thermostat communicates with the A/C's over a telephone-type cable and plugs. Over time the contacts on the plugs can develop a poor connection. Plugging and unplugging them several times will usually correct that!

Good luck, happy trails, and God bless!

Joe has a good point.The contacts can be cleaned with a pencil eraser.

Fishpcb · 02-18-2018, 04:01 PM

I will give that a try.
Thanks

Fishpcb · 02-19-2018, 05:33 PM

Well I cleaned the connector good and still only shows zone 1.
Zone 1 flashes but you can’t get it to change over to zone 2.

Darrel · 02-19-2018, 08:38 PM

The programming mini switches are on the first AC. The AC cover has to be removed to gain access. (The 4wire cable connections are in there also.)

Have a nice day - Darrel