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RV Furnace Service & Repair in Palm City

Won't ignite, blowing cold air, cycling on and off. We service and repair Suburban, Atwood, and all major RV furnace brands on-site across Martin County. Sail switch repairs from $75, full service from $165.

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What Is RV Furnace Service?

Your RV furnace is a forced-air propane heating system tucked behind a wall panel or underneath a dinette. It pulls in combustion air from outside, ignites LP gas through a burner assembly, and uses a blower motor to push heated air through the ductwork into your living space. It's a self-contained setup, and when any single component in that chain fails, you're stuck in a cold rig.

RV furnace service covers everything from routine maintenance to component replacement. That includes cleaning the burner assembly and exhaust tube, testing the ignition board and flame sensor, checking sail switch operation, inspecting the blower motor, and verifying propane pressure at the gas valve. In Palm City, we see a lot of furnace problems caused by mud dauber wasps blocking exhaust tubes during the summer months when furnaces sit idle.

We work on all major brands including Suburban (now Airxcel) and Atwood (now Dometic). Whether you've got a small 16,000 BTU furnace in a travel trailer or a 40,000 BTU unit in a fifth wheel, the diagnostic process is similar. Most repairs wrap up in 1-2 hours at your location, and we carry common parts like ignition boards, sail switches, and blower motors on our truck.

TL;DR

RV furnace service covers cleaning, diagnostics, and component replacement for your propane heating system. Common jobs include sail switch replacement ($75-145), ignition board replacement ($125-275), blower motor repair ($150-325), and full service ($165-375). We come to your location anywhere in Martin County.

Technician troubleshooting an RV HVAC system including furnace diagnostics in Palm City FL

What's Involved in Furnace Service

1

Inspect and Clean

We remove the furnace access panel, clean the burner assembly, check the exhaust tube for mud dauber nests or blockages, and inspect all visible wiring connections.

2

Test the Ignition Sequence

We trigger the furnace through a full startup cycle, watching the ignition board timing, spark generation, flame sensor response, and gas valve opening to pinpoint any failures in the sequence.

3

Replace Failed Parts

Whether it's a sail switch, ignition board, blower motor, or gas valve, we swap out the failed component and verify the replacement works through multiple heat cycles.

4

Safety and Performance Check

We verify proper combustion, check for LP gas leaks at all connections, confirm the high-limit switch functions correctly, and measure heat output at the register vents.

Furnace Service Pricing

Service Price Range
Ignition Board Replacement $125 - $275
Sail Switch Replacement $75 - $145
Blower Motor Repair/Replacement $150 - $325
Full Furnace Service $165 - $375

Final pricing depends on your furnace model and what's needed. You'll get a firm quote before we start.

Signs Your RV Furnace Needs Service

Don't wait until a cold night to find out your furnace doesn't work. These warning signs tell you it's time for service before you actually need the heat:

RV HVAC system needing professional furnace service and repair in Palm City

Furnace Service FAQs

How much does RV furnace service cost in Palm City?

Pricing depends on what's needed. A sail switch replacement runs $75-145. Ignition board replacement costs $125-275. Blower motor repair ranges from $150-325. A full furnace service that includes cleaning, inspection, and component testing runs $165-375. We'll tell you the exact cost after diagnosing the issue.

Why does my RV furnace click but not ignite?

When you hear clicking but no ignition, the furnace is trying to light but failing. The most common causes are a dirty or cracked igniter, a blocked gas valve, or low propane pressure. The ignition board sends the spark signal, and if the flame sensor doesn't detect a flame within a few seconds, it locks out the system as a safety measure. We test each component in the ignition chain to find the failure point.

What does the sail switch do on an RV furnace?

The sail switch is a safety device inside the furnace duct. It has a small metal flap that sits in the airflow path. When the blower motor starts and pushes air through the duct, the airflow pushes that flap closed, completing the circuit and telling the ignition board it's safe to light the burner. If the blower is weak, the duct is blocked, or the switch itself is stuck, the furnace won't ignite.

How often should I have my RV furnace serviced?

At minimum, once a year before the heating season starts. Even in Palm City, we get cool nights from November through March that'll have you running the furnace. Annual service includes cleaning the burner assembly, checking the exhaust tube for blockages, testing the ignition system, and verifying the blower motor is running at the right speed. Mud dauber wasps love to nest in furnace exhaust tubes during summer, so fall service is critical.

My RV furnace blows cold air. What's causing it?

If the blower runs but the air stays cold, the burner isn't lighting. This could be a failed ignition board, a stuck sail switch, an empty propane tank, or a blocked exhaust tube that's triggering the high-temperature limit switch. We also see this when the gas valve solenoid goes bad. The blower does its job, but without flame, you're just circulating cold air through the ducts.

Is it dangerous to run an RV furnace with a cracked exhaust tube?

Yes, absolutely. A cracked exhaust tube can leak carbon monoxide into the living space. RV furnaces are sealed combustion systems, meaning combustion air comes from outside and exhaust goes back outside. A crack in that sealed path lets exhaust gases escape into the RV. If your CO detector is going off when the furnace runs, shut it down immediately and call us.

Can mud daubers really cause my RV furnace to fail?

They're one of the most common causes of furnace failure in Florida. Mud dauber wasps build nests inside the exhaust tube opening on the outside of your RV. When the tube gets blocked, exhaust can't escape, the high-limit switch trips, and the furnace shuts down. We see this constantly after RVs sit unused during summer months. Cleaning the exhaust tube is part of every furnace service we do.

Furnace Not Firing? We'll Get It Running

Cold nights catch up fast when your furnace won't light. We'll come to your location, run the diagnostics, and give you a firm price before starting any work.

Call 772-271-5270