Will Chill Cube Help With GFCI Tripping On 30A Home RV Outlet

Updated 05/01/2026 | Published 04/20/2026

Question:

I have a 2006 Fleetwood with a Coleman 8335 rooftop unit. I recently had a 30A RV outlet installed at my home. It appears that the A/C unit trips the GFCI whenever the compressor kicks on. It trips immediately on 2 different GFCI outlets, but works on 2 different non-GFCI outlets. When it works, has a 35A surge current and a 15A run current, but does get cold. I dont know if this is normal and I have to work around the GFCI issue. If I do replace it , I was leaning towards the Furrion Chill Cube 18K heat pump. Do you know if that is more or less susceptible to GFCI nuisance tripping? I read somewhere that units with invertors tend to be worse does the Chill Cube have an invertor? What is the surge current?

asked by: Ken B

Expert Reply:

Hi Ken; the surge is part of it but not because of how many amps it pulls. When the compressor starts up it can cause electricity to leak to the ground instead of returning through neutral, which is tripping the GCFI. It may also be the age of the unit, which makes it more noticeable. These often aren't very GFCI friendly.

The Chill Cube # FR67TQ uses a variable speed compressor so it ramps up slowly, no major surge when it starts up. These systems use power electronics instead of a simple start capacitor, which can also cause small leakage currents and harmonics. Your GFCI is sensitive to these as well. It doesn't necessarily mean it will trip it, but there is no guarantee it won't.

Old and new RV AC units are not designed around GFCI outlets so there isn't a great solution or perfect fix. You're also bound by the electrical code since this was installed in your house. If you want an upgrade, the Chill Cube is the best on the market right now and definitely a good choice. However, you can't rely on it as a fix for your GFCI issue.

expert reply by: Robin H

Chill Cube
(click to enlarge)

Ken B.

4/30/2026

Thanks for the reply. Based on some other suggestions, I replaced the Start Capacitor relay, and the GFCI problem went away; apparently the burnt contacts created more noise/leakage. At the same time, I had also ordered a soft start device per another suggestion. This also does not trip the GFCI. That gives me hope that the variable speed compressor in the chill cube will be compatible. In the event that the Chill Cube does trip the GFCI, would there be any harm in adding the soft start device, since it helped the older unit? Or would it be incompatible? Also, does the Chill Cube have an inverter? I've heard that can affect GFCI compatibility.

Robin H.

5/1/2026

@KenB glad that fixed it! The Chill Cube does use an inverter (variable speed compressor), so it has a smooth startup without a big surge. That helps, but inverter systems can still create small leakage that GFCIs may trip on, so no guarantees. As for adding a soft start, I wouldn’t. The Chill Cube already manages startup internally, and adding one could interfere with its electronics.