11-28-2014, 01:21 AM
Jason, what is the model number of your heater?
The fourth fuse from the left, the D fuse, is the fan fuse. So the problem is fan related, not pumps.
The fans in the bath and bedroom should not run with the fuse blown. Any fan can blow the fan B fuse. I understand your problem is that the bathroom and bedroom fans provide heat. The fuse blows only when the front zone calls for heat.
There are several fan coils serving the front. You can test each fan for short to ground. You can disconnect each fan and run one at a time to see which one is the overload. If you find one fan that blows the fuse, leave it disconnected and run the others till a new fan is installed. Aqua Hot forum parts banner is the click to AH parts from Roger Berke to order the new fan.
If all fans run one at a time blow the fuse, then the power wire to all fans is shorted to ground. That will be a challenge to find where that short occurs.
Good luck in sorting this out. Remember Roger is also available for support by asking a question on the AH forum. He and I can support you on AH issues but do not know the routing of the wires in the coach. This forum has the Gurus with that kind of knowledge. So if all front fans blow the fuse, here is the place to start looking for wire routing to seek the location of a short.
The rest of the system will run fine as long as a good fan fuse is in place and the front thermostat does not call for heat or the top relay is removed disabling the front zone.
A wiring diagram is on line at Aquahot.com under Library-- Discontinued service manuals-- AHE 100-02S on page 76.
The fourth fuse from the left, the D fuse, is the fan fuse. So the problem is fan related, not pumps.
The fans in the bath and bedroom should not run with the fuse blown. Any fan can blow the fan B fuse. I understand your problem is that the bathroom and bedroom fans provide heat. The fuse blows only when the front zone calls for heat.
There are several fan coils serving the front. You can test each fan for short to ground. You can disconnect each fan and run one at a time to see which one is the overload. If you find one fan that blows the fuse, leave it disconnected and run the others till a new fan is installed. Aqua Hot forum parts banner is the click to AH parts from Roger Berke to order the new fan.
If all fans run one at a time blow the fuse, then the power wire to all fans is shorted to ground. That will be a challenge to find where that short occurs.
Good luck in sorting this out. Remember Roger is also available for support by asking a question on the AH forum. He and I can support you on AH issues but do not know the routing of the wires in the coach. This forum has the Gurus with that kind of knowledge. So if all front fans blow the fuse, here is the place to start looking for wire routing to seek the location of a short.
The rest of the system will run fine as long as a good fan fuse is in place and the front thermostat does not call for heat or the top relay is removed disabling the front zone.
A wiring diagram is on line at Aquahot.com under Library-- Discontinued service manuals-- AHE 100-02S on page 76.
Rudy Legett
2003 Foretravel U320 4010
ISM11 450 hp Allison 4000R
Factory Authorized Aqua Hot Repair Center
Southeast Texas Area