Jayco Greyhawk – AC Capacitor & Fan Motor Service

The thing that separates a good RV flipper from someone who just cleans up old rigs is systems thinking. When one component fails, I always ask what else failed alongside it, what caused it, and what’s about to fail next. RV systems are connected in ways that aren’t obvious until you’ve taken enough of them apart. On the Jayco Greyhawk specifically, the rooftop AC unit is one of the first things I check on any used unit — a failed run capacitor is almost always the culprit behind an AC that hums but won’t cool, and nine times out of ten the fan motor has been running hot for months trying to compensate, quietly burning toward its own failure. Miss the capacitor, replace the motor, and you’ve just installed a brand-new motor that’s going to fail in six months for the exact same reason — I’ve seen flippers make that mistake more than once. This guide walks you through the full diagnostic and repair the right way: capacitor first, motor inspection second, so you’re fixing the cause and not just the symptom.

The Run Capacitor That Stops the Greyhawk AC Dead in Its Tracks

A failed run capacitor on a Dometic rooftop unit doesn’t just kill cooling—it kills the fan motor trying to start. You’ll get the hum, the heat buildup, and then nothing, because the motor can’t overcome the startup resistance without that capacitor doing its job.

What works

• Drop-in replacement—no rewiring, no guessing at MFD ratings, the 60/5 dual rating handles both the run and start loads on the motor circuit.
• Heavy-duty construction means it won’t dry out in three years like the OEM unit that came in the Greyhawk; you get actual lifespan for a full-timer’s perspective.
• Motor fires up clean on first try and pulls cold air again within minutes—no lag, no strain on the compressor from the motor dragging.

What doesn’t

• Capacitor polarity matters—you have maybe thirty seconds to catch an install error before the unit shorts out, and Amazon seller photos aren’t always clear on terminal orientation.
• Some older Greyhawks have non-standard terminal spacing, and you’ll be hand-crimping or solder-connecting leads instead of a straight push-on fit.

I once swapped a capacitor on a flip Greyhawk and the motor hummed but didn’t turn—spent twenty minutes checking polarity before realizing the terminal lugs were corroded enough to block contact. Had to burnish every connection point with sandpaper before it caught. Fits for Dometic 3312195.000 Air Conditioner RV AC Motor Capacitor 60/5 MFD, Heavy Duty Air Conditioner Capacitor Replacement, Compatible with Dometic 3312195000 RV Air Conditioner Models

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