Furnace Wants To Start But Doesn’t: Troubleshooting Tips

How To Turn On Furnace In Camper / How To Turn On Furnace In Camper
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As the temperatures drop outside, a malfunctioning furnace can be a major inconvenience. If you find your furnace not starting despite repeated attempts, it’s essential to troubleshoot the issue before seeking professional help. This article provides some valuable tips to help you diagnose and fix the problem.

Check the Thermostat

The first step is to ensure that the thermostat is set correctly. Make sure it is set to the desired temperature and switched to the “heat” mode. If the thermostat has a low battery, replace it with fresh ones. Sometimes, simply resetting the thermostat can resolve the issue.

Inspect the Power Supply

Next, check the power supply. Start by inspecting the circuit breaker panel to see if the breaker for the furnace has tripped. If it has, reset the breaker and try starting the furnace again. Additionally, ensure that the furnace’s power switch is in the “on” position.

Examine the Air Filter

A clogged or dirty air filter can prevent proper airflow and cause the furnace to malfunction. Remove the filter and check if it is dirty. If it appears dirty, replace it with a new one. Regularly cleaning or replacing the air filter is essential for the furnace’s efficient operation.

Inspect the Ignition System

If your furnace has a pilot light, check to see if it is lit. A pilot light that has gone out may indicate a problem with the gas supply or the ignition system. Follow the manufacturer’s instructions to relight the pilot light. If the pilot light doesn’t stay lit, it may be a sign of a faulty thermocouple, which may require professional attention.

Check the Gas Supply

Ensure that the gas supply to the furnace is turned on. If you smell gas or suspect a gas leak, leave your home immediately and call your gas company. Gas leaks can be dangerous and should only be handled by professionals.

Inspect the Blower Motor

The blower motor is responsible for circulating heated air throughout your home. If the blower motor is not functioning correctly, it can cause the furnace to shut down. Check if the motor is running smoothly or making any unusual noises. If you notice any issues, contact a professional HVAC technician to inspect and repair the blower motor.

Consider the Age of the Furnace

If your furnace is older, it may be more prone to breakdowns and malfunctions. Furnaces typically have a lifespan of 15-20 years. If your furnace is nearing the end of its lifespan, it might be more cost-effective to replace it with a newer, more efficient model rather than continuously repairing it.

Call a Professional

If you’ve tried the troubleshooting tips mentioned above and your furnace still won’t start, it’s time to call a professional HVAC technician. They have the expertise and tools to diagnose and fix complex furnace problems. Trying to fix the issue yourself can potentially cause further damage or void the warranty.


A furnace that wants to start but doesn’t can be frustrating, especially during the colder months. By following the troubleshooting tips mentioned in this article, you can potentially identify and resolve the issue. Remember, regular maintenance and professional inspections can help prevent future furnace problems and keep your home warm and cozy.