Entegra Aspire – AC Capacitor & Fan Motor Service

A Dometic rooftop AC capacitor on an Entegra Aspire typically runs $40 to $60 online, but a dealership service call to replace it lands you a $180 to $220 labor bill for work that takes less than twenty minutes once you know where to look. When you’re living full-time in your rig, that gap between parts cost and shop labor becomes impossible to ignore — especially when the fix is straightforward enough to handle yourself. The capacitor in your Aspire’s AC unit carries the electrical load that fires up both the compressor and the fan motor, and when it begins to fail, your AC doesn’t just cool slower; it forces the compressor to strain harder on every startup cycle, the fan motor overheats and groans, and what feels like a slow decline can accelerate into a completely dead unit in weeks. This walkthrough covers spotting a failing capacitor before that happens, safely draining its charge, swapping in the replacement, and having your AC running cold again today — no service department, no waiting list, no three-week gap in your climate control.

Why That One Small Capacitor Controls Your Aspire’s Entire AC Lifespan

The run capacitor sitting inside your Dometic AC compressor housing is essentially the spark plug of your cooling system—it stores and releases electrical energy to keep the compressor and fan motor spinning smoothly. When it weakens, the compressor labors through its startup phase, thermal protection cuts power, the fan cycles on and off erratically, and you end up sweating through July in an RV that’s supposedly air-conditioned. Replacing it with the genuine Dometic spec part stops that cascade before it turns into a $1,200 compressor replacement.

What you’ll notice when it works

• Compressor engages without hesitation or the soft clicking that signals a capacitor running on fumes.
• Fan motor spins with a steady hum instead of grinding, stalling, or restarting every few minutes due to overheating.
• OEM Dometic 60/5 MFD rating ensures the electrical characteristics match your unit’s compressor and motor exactly—no compatibility guessing or aftermarket substitutes.

What won’t improve

• A seized compressor or shot motor bearings won’t be fixed by a fresh capacitor—you have to verify the compressor still turns freely before ordering parts.
• Delivery times matter when you’re parked in an off-grid location; even expedited shipping can mean five to seven days, and you’ll need backup cooling in the meantime.

I’ve installed dozens of these and second-guessed the diagnosis once—turned out the thermostat relay was also failing and masking the real symptom—but replacing the capacitor first always makes the AC behave predictably enough to isolate any secondary failures. 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

Parts and Tools

• Replacement dual run capacitor matched to the microfarad and voltage rating on the old one (typically 60/5 MFD, 370V for Dometic units) — check current price
• Needle-nose pliers or small wire strippers for disconnecting capacitor terminals
• Insulated screwdriver (Phillips and flathead) for opening the AC access panel and disconnecting wires
• Multimeter set to capacitance mode to verify the old capacitor is failing before removal
• Electrical tape to insulate and label wire connections before disconnecting
• Rubber gloves and safety glasses for handling electrical components

Step-by-Step Instructions

Step 1: Kill power to the AC unit at the breaker

Locate your Aspire’s main electrical panel and flip the breaker labeled for the rooftop AC to the OFF position. Wait five minutes to allow any residual charge to dissipate. Even with the breaker off, the capacitor itself can hold a charge—treat it as live until you’ve physically discharged it. This step prevents electrocution and protects your multimeter from damage.

Step 2: Access the AC unit on the roof and photograph the wire layout

Climb safely to the roof using a ladder and secure footing. Locate the Dometic AC shroud on top of your Aspire. Remove the four corner bolts holding the upper cover in place and set it aside. Before touching anything, photograph the capacitor terminals and all wire connections with your phone—you’ll need this reference when reconnecting. The capacitor is a cylindrical component with two or three wire terminals protruding from the top.

Step 3: Discharge the capacitor safely with an insulated screwdriver

Using an insulated screwdriver, touch both terminals of the capacitor simultaneously to ground out any remaining electrical charge. Hold the contact for two seconds. This prevents a shock when you handle the component. Even a discharged-looking capacitor can store enough energy to cause injury, so never skip this step. After grounding, use your multimeter in capacitance mode to confirm the capacitor reads zero or near-zero farads.

Step 4: Test the capacitor and confirm it’s the failure point

Set your multimeter to capacitance mode and touch the probes to the capacitor terminals. A healthy 60/5 MFD capacitor should read between 55 and 65 microfarads on the 60-side and 4.5 to 5.5 on the 5-side. If your reading is significantly lower, zero, or the meter won’t register, the capacitor has failed. Document this reading—it confirms you’re replacing the right part and rules out other AC issues.

Step 5: Disconnect the old capacitor and label the wires

Using needle-nose pliers, carefully remove each wire terminal from the capacitor posts. As you disconnect each wire, immediately wrap it with electrical tape and write its position on the tape (e.g., ‘C’, ‘FAN’, ‘HERM’) using a marker. Most Dometic capacitors have three terminals: Common (C), Fan, and Hermetic (compressor). Refer to your photograph if the labels on the old capacitor are worn. Keep the wires separated so they don’t touch each other or ground.

Step 6: Install the new capacitor and reconnect wires in reverse order

Position the new capacitor in the same orientation as the old one. Using your photograph and tape labels as a guide, reconnect each wire to its corresponding terminal on the new capacitor. Push each terminal connector firmly onto the post until it seats completely—a loose connection will cause the AC to fail again within days. Double-check that no wires are touching the metal housing or each other. Verify the capacitor is secure and not resting against any moving fan blades.

Step 7: Reinstall the AC cover and restore power

Replace the upper AC shroud and tighten the four corner bolts evenly—snug them by hand first, then give each a quarter-turn with your screwdriver to avoid cracking the plastic. Climb down from the roof safely. Return to your electrical panel and flip the AC breaker back to ON. Listen for the compressor to start within 30 seconds and the fan to spin smoothly without grinding or hesitation.

Step 8: Test the AC and verify normal operation

Set your thermostat to cool mode and lower the temperature setting 5 degrees below the current cabin temperature. Within two minutes, you should hear the compressor engage with a smooth startup (no labored grinding), feel cold air flowing from the vents, and hear the fan running at a steady pitch. Let the system run for 15 minutes and check that the compressor cycles normally—it should run continuously until the cabin reaches the set temperature, then cycle off. If the compressor still struggles or shuts down after a few seconds, the capacitor may not be the root cause.

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