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RV Furnace Clicking but Not Lighting

When you’re out on a camping trip in your RV, having a properly functioning furnace is essential for staying warm and comfortable.

However, if you encounter the issue of your RV furnace clicking but not lighting, it can be quite frustrating.

In this troubleshooting guide, we’ll explore the possible causes of this problem and provide you with solutions to get your furnace up and running again.

Igniter Issues

One of the most common causes of the clicking sound without the furnace lighting is a faulty igniter.

The igniter is responsible for creating the spark that ignites the propane gas.

If the igniter is dirty, damaged, or worn out, it may not be able to produce a strong enough spark to light the furnace.

To address this issue:

  • Check the igniter for any visible signs of damage or wear.
  • Clean the igniter carefully with a soft brush or compressed air.
  • If the igniter is damaged, it will need to be replaced.

Gas Supply Problems

Another potential culprit for the clicking but not lighting issue is a problem with the gas supply.

Insufficient or interrupted gas flow can prevent the furnace from igniting.

To troubleshoot gas supply problems:

  • Ensure that the propane tank has an adequate supply of gas.
  • Check for any kinks or damage in the gas line.
  • Test other propane appliances in your RV to see if they are functioning properly.
  • If you suspect a gas leak, it is crucial to turn off the gas supply immediately and seek professional assistance.

Electrical Connections

Faulty electrical connections can also prevent the RV furnace from lighting.

The clicking sound you hear may be the result of the control board trying to send the signal to ignite, but the connection is weak or broken.

Follow these steps to address electrical connection issues:

  • Turn off the power to the furnace.
  • Inspect the wiring connections for any signs of corrosion, loose connections, or frayed wires.
  • Tighten any loose connections and clean any corrosion using a wire brush.
  • If the wiring appears damaged, it may need to be replaced.

Thermostat Malfunction

A malfunctioning thermostat can lead to the furnace clicking but not lighting.

The thermostat regulates the temperature in your RV and sends signals to the furnace to turn on or off.

If the thermostat is not functioning correctly, it may not be sending the proper signals.

To troubleshoot thermostat issues:

  • Check the thermostat settings to ensure they are properly configured.
  • Replace the batteries in the thermostat if applicable.
  • Reset the thermostat to factory settings and reprogram it.
  • If the thermostat is old or damaged, consider replacing it with a new one.

Dirty Burner

A dirty burner can obstruct the flow of gas and prevent ignition.

Over time, dust, dirt, and debris can accumulate on the burner, affecting its performance.

To clean the burner:

  • Turn off the gas supply to the furnace.
  • Remove the burner assembly according to the manufacturer’s instructions.
  • Clean the burner with a soft brush and compressed air.
  • Ensure that all parts are dry before reassembling the burner.

Airflow Restrictions

Restricted airflow can also cause issues with the furnace ignition.

If there is not enough air circulating in the system, the furnace may not ignite properly.

Here’s what you can do to address airflow restrictions:

  • Check the furnace vents and ensure they are not blocked by any objects or debris.
  • Clean or replace the furnace filter to improve airflow.
  • Inspect the ductwork for any obstructions or damage.

Propane Regulator

A malfunctioning propane regulator can disrupt the gas flow to the furnace, leading to ignition problems.

To check the propane regulator:

  • Turn off the propane supply.
  • Inspect the regulator for any visible damage or signs of wear.
  • If you suspect the regulator is faulty, it is advisable to have it replaced by a professional.

Clogged Gas Valve

A clogged gas valve can prevent the flow of propane to the furnace, resulting in clicking but no ignition.

To address this issue:

  • Turn off the gas supply to the furnace.
  • Locate the gas valve and inspect it for any dirt or debris.
  • Clean the gas valve using compressed air or a soft brush.
  • Restore the gas supply and test the furnace.

Blower Motor Failure

If the blower motor is not functioning correctly, it can hinder the ignition process.

The blower motor is responsible for circulating the air within the furnace system.

If it fails, the furnace may not ignite.

To troubleshoot blower motor issues:

  • Check if the blower motor is receiving power.
  • Inspect the motor for any visible signs of damage.
  • If the motor is faulty, it may need to be replaced.

Furnace Control Board

The furnace control board controls the sequence of operations for the furnace.

If the control board is malfunctioning, it can result in the furnace clicking but not lighting.

To address this issue:

  • Turn off the power to the furnace.
  • Inspect the control board for any signs of damage or burnt components.
  • If the control board is damaged, it will need to be replaced by a professional.


Why is my RV furnace clicking but not lighting?

The clicking sound without ignition is often caused by issues such as a faulty igniter, gas supply problems, electrical connections, thermostat malfunction, dirty burner, airflow restrictions, propane regulator issues, clogged gas valve, blower motor failure, or a malfunctioning furnace control board.

Can I troubleshoot the RV furnace myself?

Yes, there are several troubleshooting steps you can take to identify and resolve the issue. However, if you are not familiar with RV furnace systems or if the problem persists, it is recommended to seek professional assistance.

What should I do if I suspect a gas leak?

If you suspect a gas leak, it is crucial to turn off the gas supply immediately. Open windows and doors to allow ventilation, and evacuate the RV. Contact a professional gas technician to inspect and repair the gas system.

Why is cleaning the burner important?

Cleaning the burner removes dust, dirt, and debris that can hinder the flow of gas and affect ignition. It helps ensure a smooth and efficient operation of the furnace.

How often should I clean or replace the furnace filter?

It is recommended to clean or replace the furnace filter every 1-3 months, depending on usage and environmental conditions. A clean filter promotes better airflow and improves furnace performance.

Should I attempt to replace the control board myself?

Replacing the furnace control board is a complex task that requires expertise. It is advisable to hire a professional technician to ensure proper installation and avoid further damage to the system.


A clicking sound from your RV furnace without proper ignition can be frustrating, especially when you’re relying on it to keep you warm during your travels.

By following the troubleshooting steps outlined in this guide, you can identify and address the possible causes of the issue.

Remember to prioritize your safety and seek professional help if needed.

With the proper maintenance and care, your RV furnace will provide you with reliable warmth and comfort on your adventures.