If your furnace isn’t igniting, you’re in for some cold days and nights. That’s why it’s essential to get to the bottom of why your furnace won’t turn on. Understanding the possible causes can save you time and money and help you know when it’s time to call in the professionals. Let’s take a closer look at the top culprits behind a malfunctioning furnace.
1. Thermostat Issues
One of the first things to check when your furnace won’t turn on is your thermostat. It might seem obvious, but you’d be surprised how often the solution is as simple as making sure your thermostat is set to “heat” mode and that the date and time are correct. If your thermostat isn’t set correctly, your furnace won’t get the signal to start heating.
Another thermostat-related issue could be dead batteries. If your thermostat’s display is blank or fading, try replacing the batteries. If these simple tricks don’t work, it’s time to check a few different components.
2. Power Supply Problems
If your electric furnace won’t turn on, it could be due to a power supply issue. Check your home’s circuit breakers to see if the one controlling your furnace has tripped. If it has, reset it and see if that solves the problem. Please note that if the circuit breaker trips again soon after resetting, there might be a more serious electrical issue that requires professional attention.
Don’t forget to check if the furnace’s power switch is in the “on” position. This switch often looks like a regular light switch and is typically located on or near the furnace. Sometimes, it can be accidentally turned off during cleaning or other household activities. If these steps don’t help resolve the problem, you should consider calling an HVAC technician for an electric furnace repair.
3. Gas Supply Issues
For those with a gas furnace, the problem might be related to the gas supply. If your furnace won’t ignite, check to make sure the gas line to your furnace is open. If you’ve recently had work done on the line or if there’s been a disruption in service, this could be the culprit.
It’s important to note that if you smell gas, don’t attempt to fix the problem yourself. Leave your home immediately and contact your gas company. Gas leaks are serious and can be extremely dangerous.
Remember, issues with gas can be dangerous. If you’re unsure about anything related to your gas supply, it’s always best to call a professional.
4. Pilot Light or Ignition System Problems
Older furnaces often have standing pilot lights, while newer models typically use an electronic ignition system. Both can cause issues if they’re not working properly.
If your furnace has a standing pilot light and you can’t get your furnace to ignite, it’s possible the pilot light has gone out. If you’re comfortable doing so, you can try relighting the pilot light yourself by following the manufacturer’s instructions. However, if you smell gas or are unsure about the process, it’s best to call a professional.
If your furnace has an electric ignition system, a faulty sensor could prevent the unit from turning on. The ignition sensor (or flame sensor) detects whether a flame is present and shuts off the gas if it isn’t. Over time, this sensor can become covered in soot or corrosion, preventing the entire furnace from functioning correctly.
5. Dirty or Clogged Air Filters
Believe it or not, something as simple as a dirty air filter can cause your furnace to stop working. When air filters get clogged with dust and debris, they restrict airflow, which can cause the furnace to overheat and shut down as a safety measure.
Regularly changing your air filters is an essential part of furnace maintenance. Not only does it help prevent breakdowns, but it also improves your furnace’s efficiency and the air quality in your home. Most experts recommend changing your furnace filter every 1-3 months, depending on factors like pets, allergies, and the type of filter you use.
6. Blocked Exhaust Vent
For safety reasons, if your furnace’s exhaust vent is blocked, the system will shut down to prevent carbon monoxide from backing up into your home. Check the outdoor exhaust vent for any obstructions like leaves, debris, or even small animal nests. If it’s winter, make sure that snow or ice isn’t blocking the vent.
8. Wear and Tear
Sometimes, a furnace won’t turn on simply because of age and wear. Furnaces typically last 15-20 years, and as they age, they become more prone to breakdowns. If your furnace is older and has been requiring frequent repairs, it might be time to consider replacement. Ask our team today if a new furnace installation is right for you.
When to Call the Professionals
While some furnace issues can be resolved with simple DIY fixes, others require the expertise of trained HVAC technicians. If you’ve gone through these common problems and your furnace still won’t turn on or ignite, it’s time to call in the experts.
At RepairUSA, our team of skilled technicians is ready to diagnose and solve even the most complex furnace problems. We will get your heating system back up and running efficiently in no time. We can even provide ongoing furnace maintenance services so that you don’t have to worry about frequent breakdowns!
Contact our team today for a furnace repair in Jonesboro, AR, and stay warm and safe.
