Dometic zone 1 dead
My front zone seems to have come up lame. (rear zone works perfect) This is a 5 button dometic duo-therm, controling a pair of 15k dometic a/c - heat pump units, and a pair of propane furnaces. ...
Forum Discussion
Are you stating that Zone 1, ALL the various mode operations are displayed? When you toggle thru Fan/COOL/HP/Furnace, ALL will show in the display? Only the furnace uses 12 volts to run. ALL other Zone 1 operations requires 120 volts to the Front AC Zone 1. There are 2 BLUE wires at the Zone 1 control board. You should be able to drop the return AC grill from inside and find those 2 wires. They should have 12 volts on 1 wire and 12 volts on BOTH when furnace is called for. IF you have NO 12 volts on either wire, then as Chris suggested, either the CB on the furnace is tripped or the FUSE for the Furnace is tripped/Blown. There may be a separate fuse for just the front Furnace. Usually, since you removed that fuse and the tstat went DEAD, that means there may be another fuse for the front furnace. The POWER for the Zone 2 control board and tstat display comes from the FRONT Zone 1 control board. BUT, the FIRST thing is to verify those 2 blue wires for power. Doug
Your one question about lock out. The furnace will attempt 3 time to light and if you have run out of LP will indeed shut down. But, all you do is have the tstat call for another furnace cycle and it will respond. BUT, you may have to cycle that furnace 4 or more times(12 ignition cycles or more) to bleed the system of "air" since you ran it out of LP. Not really air, but lack of LP. Doug
Your one question about lock out. The furnace will attempt 3 time to light and if you have run out of LP will indeed shut down. But, all you do is have the tstat call for another furnace cycle and it will respond. BUT, you may have to cycle that furnace 4 or more times(12 ignition cycles or more) to bleed the system of "air" since you ran it out of LP. Not really air, but lack of LP. Doug
