RV Furnace Repair

Southwest Florida winters are mild, but cold snaps in January and February can drop overnight temperatures into the 30s and 40s — cold enough to make a working furnace essential. When your RV furnace fails to ignite, blows cold air, or cycles erratically, Sun Coast RV Service diagnoses and fixes the problem at your location.

Common RV Furnace Problems

• Faulty igniter — Hot surface igniters crack from thermal cycling. We carry replacements for Suburban, Atwood, and Dometic furnaces.
• Dirty or stuck sail switch — The sail switch confirms airflow before allowing ignition. Dust and debris can prevent it from closing.
• Bad control board — The circuit board sequences ignition and safety checks. A failed board prevents the entire ignition cycle.
• Gas valve failure — A stuck or failed gas valve blocks propane flow. We test valve operation and gas pressure at the burner.
• Blower motor issues — Weak or noisy blowers reduce airflow and can trigger safety shutdowns. Motor replacement resolves the issue.
• Exhaust blockage — Mud dauber nests and debris in the exhaust tube are common in Florida. We clear blockages and install screens.

Our Diagnostic Approach

We test the full ignition sequence — 12V power supply, thermostat signal, blower operation, sail switch, gas valve, igniter, and flame sensor. This systematic approach identifies the exact failure point so we fix it right the first time.