Troubleshooting A Fogatti Tankless RV Water Heater That Won't Power On

Question:

My fogatti tankless water heater controler has power on both wires but does not operate no lights of ayn kind on controler

asked by: Danny G

Expert Reply:

The Fogatti RV Tankless Water Heater # LSB64FR has a switch located inside the unit to the left of the exhaust vent. If this switch is off the unit will not operate. There's also a fuse right below it that you'll want to check before turning the unit on.

If the fuse is fine and the switch is on and the unit still isn't powering on then you'll need to test the power wire at the unit and also at the thermostat/controller with a multimeter # PT89ZR to see if maybe you're not getting a full 12 volts. If you're getting less than 12v then either your power source (battery) is the issue or you're experiencing voltage drop and will need to increase the wire gauge running between the two.

You'll also want to check your ground wire and ensure that it's running to bare metal (preferably the chassis) and is secure.

If you've checked all this and still can't get it to turn on then let me know and we can keep troubleshooting.

expert reply by: Kevin C