I got the unit running again, the .4 amp breaker was tripped, which in turn made the 25A breaker trip. Once I reset the overheat breaker, then the unit would start again, but the main breaker has been exercised too many times and now it trips halfway through the start up. I jumped it out for a test and the unit ran fine. I’d like to replace both of these, I think they are too sensitive.
I have a couple more questions if you don’t mind…
1.) The manual talks about a full and half heat setting. My unit has an updated airtronic Thermostat (the one with the on/off rocker and red/green LED, rotary temp.)
This thermostat doesn't seem to support half heat as it is only three wire. Could I install another switch to toggle between half and full heat? If yes, what wires get connected or lifted?
2.) I got the unit running on the bench, and it seems to run fine. How important is the flexible intake hose to be in place? Mine got crushed…
3.) The duct work seems to be too restrictive in the boat, causing the unit to overheat. In fact the duct work stated smoking it was so hot. The manual shows an optional temp reducer, is this still available?
The main duct leaving the unit is at least 5-6” round and then branches off multiple times. The inlet is pretty short, 4-5 feet 3” up sized to 4”
4.) Is it acceptable to have the exhaust take a square 90° turn into the stack pipe? Although it has been this way for a while, this seems restrictive to me.
I’m trying to determine what is different, the heater has been running in the boat since the early 90’s, and recently it is acting up.
-DC