Troubleshooting A Furrion Tankless Water Heater That Keeps Blowing Fuses

Updated 03/23/2025 | Published 03/03/2023

Question:

Ref # 114346823 I put this unit in and it’s blowing the fuse

asked by: Wade R

Expert Reply:

The Furrion RV Tankless Water Heater # FR93FR would blow the fuse repeatedly if the control board was malfunctioning or if there was a short in the wiring. I recommend checking the all wiring connections first to make sure everything is secure and that there's no damage to the wiring.

I have had people in the past that have had 120v wiring for their previous water heater and then switched to a 12v unit like the # FR93FR and just connected the 120v AC wiring to the unit and fry the fuse and board so I would definitely confirm that you're using 12v DC to power the unit.

Let me know what you find and we can keep troubleshooting further.

expert reply by: Kevin C

Christopher

3/23/2025

Idk why but my on demand system in my new system is blowing internal fuses !

Jerred H.

3/23/2025

@Christopher What water heater do you have and have you checked the wiring connections for faults and ensured you have a solid ground?

Christopher

3/23/2025

@JerredH it is a LALAHOO 6800 it says 12volt dc , should I run a direct wire from the battery?

Jerred H.

3/23/2025

@Christopher You shouldn't have to but we do not carry that brand and when I look up the LALAHOO 6800 information you gave me it says it's a bidet. Do you have the installation instructions? Because I recommend starting there or contacting the manufacturer for their guidance.