RV furnace not working: what to check and what it costs

An RV furnace that will not fire is easy to ignore in a mild Bakersfield winter, and much less easy to ignore if you are headed up to Tehachapi or the Kern River Valley, where nighttime temperatures run genuinely cold. Most repairs run $200 to $800.

Check this first (ten minutes)

Confirm the fan runs when the thermostat calls for heat. If the fan runs, 12V power and the blower motor are working, which narrows the problem to the ignition sequence.
Confirm propane is flowing, using another propane appliance to check.
Listen for the ignition attempt. Clicking followed by no flame, or no clicking at all, point to different parts of the sequence.
Check the sail switch, if you know where it is. This switch confirms adequate airflow before allowing gas to flow, and a stuck or misadjusted one is a common, inexpensive fault.
Check exterior intake and exhaust vents for blockage, including nests or debris, especially on a rig that has sat unused for a while.

What is usually wrong

What you find	Likely cause	Fix and cost
Fan doesn’t run at all	12V power fault or blower motor failure	See electrical repair or blower repair
Fan runs, no ignition attempt	Sail switch or control board fault	$200 to $450
Ignition attempts, no flame	Blocked burner tube, gas valve, or igniter	$200 to $500
Lights, then shuts off shortly after	Overheat sensor or airflow restriction	$200 to $500
Blower motor runs weak or noisy	Aging or failing blower motor	$400 to $800
Exterior vent blocked	Debris or nest in intake/exhaust	Clear vent, low cost

Those ranges are from the pricing page, on top of the $75 to $150 trip fee and $125 to $190 hourly labor.

Why this matters more than the Bakersfield climate alone suggests

Bakersfield’s own winter is mild, nights average around 40 degrees with occasional freezes, but Kern County RV owners regularly travel to places with a very different winter: Tehachapi sits near 4,000 feet and typically sees 15 to 20 inches of snow a season, and the Kern River Valley and Sequoia National Forest foothills get genuinely cold overnight even when the valley floor does not. A furnace that has not run since last winter, or has never been tested at all, is exactly the kind of thing that fails quietly until the one night you actually need it. Testing it before a mountain trip, in daylight and at home, is cheap insurance.

What to expect on the call

Tell us whether the fan runs, whether you heard an ignition attempt, and whether the furnace has been used recently. We work on site across Bakersfield, Oildale, Rosedale, Shafter, Taft, Tehachapi, and the Kern River Valley. The repair cost calculator will price a range now.

Frequently Asked Questions

My furnace fan runs but there's no heat. What's wrong?

Usually the sail switch (which confirms airflow before allowing ignition), a blocked burner tube, or a failed igniter or gas valve. The fan running tells you 12V power and the blower are fine, which narrows the search to the ignition sequence.

Does a furnace matter much in Bakersfield's climate?

More than you'd think if you travel to the Kern River Valley or up into Tehachapi. Winter nights in Bakersfield itself are mild but can dip toward freezing, and Tehachapi sits at nearly 4,000 feet and gets real winter cold and occasional snow. A furnace that has not been used or checked in months is a bad thing to discover does not work on a cold mountain night.

What does furnace repair cost?

$200 to $800 depending on the fault. Sail switches and igniter boards are toward the lower end; a blower motor replacement is toward the higher end.

Should I test my furnace before a mountain or Kern River Valley trip?

Yes, especially if it has not run since last winter. A five-minute test at home, in daylight, with propane confirmed working, beats discovering a dead furnace at a cold campsite after dark.