Winnebago View – AC Capacitor & Fan Motor Service

Winnebago View – AC Capacitor & Fan Motor Service

by

Complete repair guide for the Winnebago View – AC Capacitor & Fan Motor Service. Follow these steps to diagnose and fix the issue yourself.

Parts & Tools You’ll Need

Step 1: Diagnose AC Performance Issues

Start by running your Winnebago View’s air conditioner on high cool mode for 10 minutes while monitoring the thermostat display and listening for unusual humming or rattling sounds from the rooftop unit. Use your non-contact infrared thermometer to measure the temperature of the cold air discharge from the AC vents—you should see readings between 40-50°F; anything warmer indicates a capacitor or motor failure. Note any symptoms like weak airflow, complete AC shutdown, or the compressor running without the fan motor engaging, as these point to specific component failures.

Step 2: Disconnect Power and Access Rooftop Unit

Turn off the main power disconnect switch inside your RV, then flip the corresponding 30-amp breaker to fully de-energize the AC system—never work on live electrical components. Climb onto your roof using a secure ladder and locate your Winnebago View’s rooftop AC shroud, typically a rectangular plastic cover measuring approximately 16 x 24 inches; you’ll need to remove 4-6 Phillips head screws or quarter-turn fasteners to access the interior components. Take a photo of the wiring harness before disconnection to reference during reassembly.

Step 3: Remove and Test the Run Capacitor

Locate the RV AC dual run capacitor—a cylindrical aluminum component about 3 inches long marked with microfarad (µF) ratings, typically 40/5 µF for Dometic or Coleman-Mach units—and disconnect the two spade terminals using needle-nose pliers. Before touching it, discharge any residual electrical charge by placing an insulated screwdriver across both terminals for 5 seconds to prevent shock. If you’re replacing the capacitor due to bulging, leaking fluid, or visible damage, proceed directly to installation; if testing a suspect unit with a multimeter, expect readings within 5% of the marked microfarad rating for a functioning capacitor.

Step 4: Inspect and Clean the Fan Motor Assembly

Examine the RV rooftop AC fan motor for dust accumulation, bent fins, or seized bearings by attempting to gently rotate the fan blade by hand—it should spin freely with minimal resistance. Spray the AC evaporator/condenser coil cleaner foam directly onto the cooling fins and motor housing, allowing it to sit for 3-5 minutes before rinsing with low-pressure water; this removes debris that restricts airflow and causes the motor to overheat. Use your fin comb/coil straightener tool to gently comb out any bent aluminum fins, working in the direction of the fins to avoid further damage.

Step 5: Replace the Fan Motor and Capacitor

Remove the fan motor by unbolting the 3-4 mounting brackets securing it to the AC frame, then disconnect the motor’s wiring harness by pressing the retaining clip; note the motor’s rotation direction marked on its housing. Install the new RV rooftop AC fan motor in reverse order, ensuring the mounting bolts are torqued to 8-12 foot-pounds and the wiring harness clicks fully into place. Connect the new RV AC dual run capacitor by inserting the spade terminals firmly onto the matching pins until they’re seated completely—loose connections are the most common cause of AC failure.

Step 6: Seal and Reassemble the Rooftop Unit

Before reinstalling the rooftop AC shroud/outer cover, inspect the AC roof gasket for cracks or flattening and replace it if it’s compressed or damaged; a poor seal allows water intrusion and reduces cooling efficiency. Apply a thin bead of self-leveling sealant along the gasket perimeter to ensure a watertight bond, then reinstall the shroud using your original fasteners—hand-tighten all screws first, then snug them in a cross-pattern to ensure even gasket compression. Allow the sealant to cure for 24 hours before operating the AC at full capacity.

Step 7: Test AC Operation and Verify Performance

Restore power by flipping the 30-amp breaker back on and set your thermostat to cool mode at 72°F, allowing the system to run for 15 minutes while monitoring for smooth fan operation and normal compressor cycling. Use your non-contact infrared thermometer to verify discharge air temperature between 40-50°F and measure airflow velocity at supply vents using your hand to feel for strong, consistent pressure. Listen for normal compressor hum and fan motor operation—the fan should start and stop with thermostat demand—and verify that interior temperatures drop 3-4 degrees within the first 10 minutes, confirming capacitor and motor replacement was successful.