Coleman Mach 67 A/C Fuse 2 Amp 3-Pack | 7330-3343

Not the most glamorous part in your RV, but when your rooftop air conditioner goes dead on a hot afternoon, a blown fuse is one of the first things worth checking. This is the 2 amp replacement fuse for the Coleman Mach 67 model air conditioner, and it comes three to a pack so you're not scrambling for a single spare.

Here's what's happening inside your AC. The control board runs on a low-current circuit, and that circuit is protected by a small fuse rated at 2 amps. When something draws more than the board is built to handle, a power surge, a momentary short, a component starting to fail, the fuse gives up first. That's its whole job. It sacrifices itself so the expensive control board behind it doesn't. Swap in a fresh one and, more often than not, your air conditioner comes right back to life.

This is the genuine Coleman-Mach part, MPN 7330-3343, so it's the exact rating the board was designed around. Don't guess at amperage with whatever's rattling around in the junk drawer. A fuse rated too high won't blow when it should, and that's how a cheap part turns into an expensive repair. Match the rating, every time.

Replacing it is straightforward. Kill the power to the AC at the breaker first, always. Then pull the ceiling assembly or access the control box per your unit's manual, locate the fuse holder on the board, and swap the old fuse for a new one. If the replacement blows again right away, that's a sign something downstream needs a closer look, and it's worth calling a tech before you burn through the rest of the pack.

Why three in a pack? Because fuses are cheap and being stuck without one isn't. Toss the spares in your RV parts kit next to your other consumables. The next time the AC quits on a camping trip, you'll have the fix on hand instead of hunting down a parts counter two hours from the campground. It's a small part that keeps a big appliance running, and it's smart to keep a few around.