Complete repair guide for the Highland Ridge Open Range – Furnace Igniter & Control Board Replacement. Follow these steps to diagnose and fix the issue yourself.
Parts & Tools You’ll Need
- Suburban/Atwood RV furnace replacement unit
- Furnace igniter electrode assembly
- Furnace sail switch
- Furnace circuit board / control board
- Furnace high-limit switch
- Furnace blower motor (12V DC)
- Propane/CO combo detector alarm
- Digital multimeter (auto-ranging)
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Step-by-Step Repair Guide
Step 1: Diagnose Furnace Ignition Failure
Begin by turning off your RV’s propane supply and electrical power to the furnace system for safety. Use your digital multimeter to test the igniter electrode for continuity and check the control board for any visible burn marks or corrosion that indicate failure.
Step 2: Disconnect Power and Propane
Switch off the main electrical breaker to your furnace and close the propane shutoff valve located at your RV’s main tank or regulator. Allow the furnace to cool completely for at least 30 minutes before proceeding with removal.
Step 3: Remove Old Furnace Components
Unbolt the access panel covering your furnace and disconnect all wiring harnesses from the failing igniter electrode and control board. Carefully remove the old igniter assembly and circuit board, noting the exact positions of wire connections for reinstallation.
Step 4: Install New Igniter Electrode
Position your new furnace igniter electrode assembly into the burner chamber, ensuring it sits at the correct distance from the burner surface. Secure the assembly with mounting bolts and reconnect the wire harness to the control board terminal.
Step 5: Mount Replacement Control Board
Install the new furnace circuit board in its mounting bracket, ensuring proper ventilation around the component to prevent overheating. Connect all wiring harnesses including the sail switch, high-limit switch, and blower motor leads according to your original connection diagram.
Step 6: Verify Sail and Limit Switches
Test that your furnace sail switch moves freely without obstruction and that the high-limit switch clicks when heated with a heat gun. Replace either switch if it fails to respond or shows signs of damage during testing.
Step 7: Test Complete Furnace Operation
Restore propane and electrical power, then set your thermostat to heat mode and listen for the igniter spark and burner ignition within 30 seconds. Use your multimeter to confirm proper voltage at the blower motor and verify your propane/CO detector alarm functions correctly once the furnace cycles.
Recommended Parts
| Part | Link |
|---|---|
| Suburban/Atwood RV furnace replacement unit | View on Amazon |
| Furnace igniter electrode assembly | View on Amazon |
| Furnace sail switch | View on Amazon |
| Furnace circuit board / control board | View on Amazon |
| Furnace high-limit switch | View on Amazon |
| Furnace blower motor (12V DC) | View on Amazon |
| Propane/CO combo detector alarm | View on Amazon |
| Digital multimeter (auto-ranging) | View on Amazon |