Complete repair guide for the Crossroads Redwood – AC Capacitor & Fan Motor Service. Follow these steps to diagnose and fix the issue yourself.
Parts & Tools You’ll Need
- RV AC dual run capacitor (Dometic/Coleman-Mach)
- Rooftop AC fan motor
- RV AC thermostat / control board
- AC evaporator/condenser coil cleaner foam
- Rooftop AC shroud / outer cover
- AC roof gasket & self-leveling lap sealant
- Fin comb / coil straightener tool
- Non-contact infrared thermometer
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Step-by-Step Repair Guide
Step 1: Diagnose AC Issues and Ensure Safety
Start by identifying your symptoms—whether the AC is blowing warm air, the fan isn’t running, or you’re hearing unusual noises from the rooftop unit. Before beginning any work, turn off power at your RV’s main breaker and disconnect the negative battery terminal to prevent electrical shock and accidental system activation.
Step 2: Remove Rooftop AC Shroud Cover
Climb onto your Crossroads Redwood’s roof and locate the AC unit’s outer shroud secured by Phillips head screws around its perimeter. Carefully remove all fasteners and gently lift away the shroud to expose the internal components, noting the position of any wiring connections for reassembly.
Step 3: Replace Dual Run Capacitor Unit
Locate the cylindrical capacitor mounted near the fan motor and take a photo of its wire connections before disconnection. Discharge any residual voltage by using an insulated screwdriver to touch the capacitor terminals together, then unbolt the old unit and install your new Dometic/Coleman-Mach capacitor in the identical position with proper wire connections.
Step 4: Install New Fan Motor Assembly
Remove the bolts securing the old fan motor and disconnect its wiring harness carefully, keeping track of each connection point. Position your new fan motor into the mounting bracket, ensuring the shaft alignment is correct, then reconnect the wiring and secure all mounting bolts firmly to prevent vibration.
Step 5: Clean AC Coils and Fins Thoroughly
Apply the AC evaporator/condenser coil cleaner foam according to product directions, allowing it to break down accumulated dust and debris buildup. Use your fin comb to gently straighten any bent cooling fins, which improves airflow efficiency and prevents future cooling problems in your RV.
Step 6: Reseal Roof Gasket and Cover
Remove the old roof gasket material and clean the mounting surface thoroughly with a dry cloth to ensure proper adhesion. Apply fresh gasket material and self-leveling lap sealant along the shroud perimeter, then carefully reinstall the outer cover and tighten all fasteners in a crisscross pattern.
Step 7: Test System Performance and Temperature
Restore power to your RV and activate the AC through your thermostat, listening for normal fan startup and smooth operation. Use your non-contact infrared thermometer to verify that cold air is flowing from the vents, confirming your capacitor and motor replacement restored proper cooling function.
Recommended Parts
| Part | Link |
|---|---|
| RV AC dual run capacitor (Dometic/Coleman-Mach) | View on Amazon |
| Rooftop AC fan motor | View on Amazon |
| RV AC thermostat / control board | View on Amazon |
| AC evaporator/condenser coil cleaner foam | View on Amazon |
| Rooftop AC shroud / outer cover | View on Amazon |
| AC roof gasket & self-leveling lap sealant | View on Amazon |
| Fin comb / coil straightener tool | View on Amazon |
| Non-contact infrared thermometer | View on Amazon |