LouLawrence wrote:
New, Dometic. Older 3 zone thermostat. Had to replace New style control board with old style from previous unit.
You show a 1998 Prevost. Still have it? You have 3 HP's? Now it gets interesting. How many of the HP's have you had replaced? There were 3 Tstats from 1998 to now.
1. Was the original one control 4 button? NO Zone button?
2. The next was the 5 button Zone control(released 2001 and the 4 button discontinued). HAS Zone button
3. The LAST is a 12 button Zone control released about 10 years ago.
Now, you CANNOT mix the various HP's up with the wall tstats. YOU CANNOT TAKE THE NEW HP CONTROL BOARD OFF THE NEW HP AND INSTALL THE OLDER CONTROL BOARD IN ITS PLACE. You will get malfunctions. Possibly like you have now. You have to purchase this Dometic control board kit ( 3313107.107) and install it on the NEW HP you have. Which allows the NEW HP to interface with your wall tstat. Since you state you had to remove the NEW HP control, that means you have a PENGUIN lo profile model. You really need to post the Model numbers of all 3 HP's. Doug