Our coach has the AHE-100-02S model Aquahot with a diesel burner, engine preheat, and hydronic heater (electric element) toggle switches. The diesel burner and engine preheat toggle switches are found over the kitchen sink built into the cupboard. The hydronic heater (electric element) toggle switch is one of several breaker switches included in the main 120v panel found in the bedroom. The AHE-100-02S does not have a panel or remotely connected status box. The diesel burner and engine preheat toggle switches have a green light built into the toggle switches which are bright green when the respective switch is turned ON. All three toggle switches turn on and off independent functions... meaning any combination of switches can be ON or OFF. If the diesel burner toggle switch and its green light are ON but the diesel burner is not burning, then either the coolant has reached the heat setpoint and the diesel burner has shut off, OR if the coolant is cold, then the diesel burner has malfunctioned and needs to be reset. To reset the diesel burner, simply move the diesel burner toggle switch to its OFF position and back to its ON position and the green light will come on and the diesel burner will restart and again start burning to make heat. When the diesel burner needs maintenance, then it will not burn at all or for only a few minutes, and will show its fault condition by turning the green light OFF on its toggle switch.
We are not living in the coach while in Yuma. It is a 21-ton anchor sitting in the driveway hooked up to 30 amp power, water, and sewer with the ignition key in its OFF position. The Aquahot is fully turned off... meaning all three toggle switches (diesel burner, engine preheat, and hydronic heater (electric element)) are OFF. The only power being consumed is the battery charging function of the inverter. I just went out to the coach and turned the wall thermostats to FURNACE for all three living zones (living room, bathroom, and bedroom) and turned the thermostats up to 80 for all three zones. The floor furnaces (3 living room, 1 bathroom, 1 bedroom) all immediately turned on trying to heat the coach's interior. Obviously, with no heat in the Aquahot, the furnaces stayed cold. My point is that none of the three toggle switches need to be ON for the floor furnaces to run... even though there is no heat in the Aquahot.