Originally Posted by Stealth01
Repossessed RV... first thing I would do is open your Aqua-hot compartment, on the wall of the compartment there will be a panel with indicator lights for the various functions of the Aqua-hot system... Check the "under voltage" warning light, it will be red. If illuminated, take a paperclip and perform a "reset" on the system. The red light should extinguish and the system should fire up when turned on. Aqua-hot/Hydro-hot is very sensitive to under voltage conditions and will shut down if experienced. And I doubt that a repossessed RV had the batteries taken care of while waiting for a new owner!
The electron controls did not appear on the AquaHot until around '04 so this panel does not exist on the OPs unit.
If the OP is still following this thread:
1. Turn off both the diesel switch and the electric heating element switch.
2. Wait several hours.
3. Check coolant in overflow tank & made sure it's up to the min line. This year of AquaHot uses standard green automotive coolant mixed 50/50.
4. Turn on the diesel burner switch.
5. Go outside at the AquaHot exhaust and listen & watch.
6. The coolant should be cool enough for the diesel burner to go through the fire sequence. If it's going to fire it will. If it does not you will need to do a lot of research or go to an AquaHot tech to troubleshoot.
I suggest going to this forum:
Roger is the foremost AquaHot expert around and he can guide you.