Jayco North Point – Furnace Igniter & Control Board Replacement

This guide covers the complete furnace igniter and control board replacement procedure for the Jayco North Point – Furnace Igniter & Control Board Replacement. Follow each step carefully to restore reliable heat to your fifth wheel.

Parts & Tools You’ll Need

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Step-by-Step Repair Guide

Step 1: Disconnect Power and Isolate Propane Supply

You’ll need to turn off the main 12V DC battery disconnect switch and shut off the propane supply valve at the tank before beginning any work. Wait at least 5 minutes to allow residual propane to dissipate, then use your digital multimeter set to DC voltage to verify the furnace control board shows 0V at the main terminals.

Step 2: Remove Furnace Access Panel and Document Assembly

Locate the furnace access panel on your Jayco North Point (typically found in a lower cabinet or compartment) and remove the four Phillips-head screws securing it. Take clear photos of the furnace wiring diagram label and the existing connections before disconnecting anything, as you’ll reference these during reassembly.

Step 3: Test and Replace Furnace Igniter Electrode Assembly

Set your digital multimeter to resistance (ohms) mode and test the furnace igniter electrode assembly’s continuity—a healthy electrode reads 4-14 ohms, while a failed one reads open or infinity. Disconnect the two-pin connector from the igniter and remove the mounting bracket screw, then install the new furnace igniter electrode assembly in reverse order, ensuring the electrode tip sits 1/8 inch from the burner.

Step 4: Inspect and Test Furnace Sail Switch Continuity

Locate the furnace sail switch (a spring-loaded paddle valve near the blower intake) and use your multimeter on resistance mode to confirm it closes when manually depressed—a functioning switch should read under 1 ohm when engaged. If the sail switch fails the continuity test or shows signs of corrosion, replace it using the two mounting screws and the two-pin connector.

Step 5: Remove Old Control Board and Install Replacement

Photograph or label each wire connected to the furnace circuit board / control board using masking tape, noting the specific terminal positions (typically labeled T1, T2, GND, etc.). Unscrew the control board from its mounting bracket, disconnect all wiring harnesses, and install the new furnace circuit board / control board in the same orientation before reconnecting each wire to its corresponding terminal.

Step 6: Verify High-Limit Switch and Blower Motor Function

Set your digital multimeter to resistance mode and test the furnace high-limit switch continuity—it should read under 1 ohm at room temperature and open at approximately 120°F (you may need to apply gentle heat with a heat gun to test the trip point). Check the furnace blower motor (12V DC) by connecting it directly to a 12V battery source briefly to confirm it spins freely without grinding noises.

Step 7: Restore Power and Execute Complete System Test

Reconnect the 12V DC battery, turn on the propane supply valve, and set your thermostat to heat mode at 80°F to initiate a furnace cycle—you should hear the ignition spark within 10 seconds and smell a brief propane odor before combustion begins. Allow the furnace to run for at least 2 minutes, verify warm air flows from all vents, then test your propane/CO combo detector alarm to ensure it’s functioning properly before sealing the access panel.

Recommended Parts & Affiliate Links

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