Troubleshooting a Furrion Thermostat Giving an E3 Error Code
Updated 05/13/2025 | Published 03/31/2025
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Question:
I replaced my furrion thermostat and it gives me E 3 code I turned of the power and my solar panel along with the battery the ac comes on for few minuites and shuts off flashing the E3 code again i installed my old thermo stat and ac works . the reason i changed the thermo was my old thermo is off is reads 80 in the trailer and the thermo is set at 73 my unit will not come on so i figured my thermo is bad and i bought a new one and keep getting the E3 code . what should be my next step to take
asked by: Randall M
Expert Reply:
Hey Randall, sorry to hear about that! So an E3 error is a loss of communication between the thermostat and the control box. Since you already power cycled the wires, the next thing I'd do is try connecting the wires from the thermostat directly to the controller. If you're still not getting a resolution after that, then you can try flipping the A & B wires as well to see if that fixes it.
If you're still having issues even after all that, then I'd start with a new thermostat to see if it was an issue with the thermostat itself # FR88TD. If that does not fix it still, then the issue has to be with the controller, in which you'd need the Replacement Single Zone Controller for Furrion Chill HE RV # FR43PR.
If you have any other questions, please feel free to drop a comment and let me know!
Product Page this Question was Asked From
Replacement Wall Thermostat for Furrion Chill HE RV Air Conditioner - Single Zone - Black - R32
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- RV Air Conditioners
- Thermostat
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- Furrion
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Douglas N.
5/4/2025
Getting a code of LO on the fusion thermostat disconnected power disconnected battery waited 24 hours install new battery installed power 250 A. Everything in the unit is working on 12 V and 110 voltage air conditioning was working then stopped before it’s went to LO code blinking blue. I have no control of the thermostat voltage is all good at 13 three voltage.