There are few things more frustrating than a broken heater when it’s freezing outside. A functioning heating system is essential for comfort and safety, and prolonged exposure to cold temperatures can have serious health consequences.
If your heat’s not working, you’ll want to figure out why. Sometimes, the culprit is a simple issue like a faulty thermostat, a tripped breaker, a clogged filter, or an empty fuel tank. With a little troubleshooting, you may be able to resolve the problem yourself.
However, some heating problems require the expertise of a qualified HVAC technician. Complex electrical, gas, or mechanical issues can be dangerous to handle on your own. This article will help you determine whether you can fix your “heat not working” house problem yourself or if it’s time to call a professional.
Common reasons why your house heater isn’t working
When the house is cold and the heater isn’t cooperating, it’s natural to feel a little panicked. But before you call a repair service, there are a few things you can check yourself.
Thermostat issues
Sometimes the problem is as simple as an incorrect setting on your thermostat. Make sure the thermostat is set to “heat” and that the temperature you’ve selected is higher than the current room temperature. If your thermostat runs on batteries, check them and replace them if needed.
If the thermostat is wired incorrectly or has internal issues, it might not be able to do its job. Thermostat issues can be complicated, so you may need to call a professional to diagnose and repair the system. You can try cleaning the thermostat components first, but if that doesn’t work, it’s time to call for help.
Power supply problems
Check your circuit breaker panel for tripped breakers and reset any that have been tripped. You should also check your fuses and replace them if they’re blown.
Your heater might have a shut-off switch that’s been accidentally turned off. Make sure all the shut-off switches are in the “on” position.
Dirty or clogged filters
Dirty filters restrict airflow, which causes your heater to overheat and shut down. Restricted airflow reduces efficiency and can damage the heater. Dirty filters can also cause poor indoor air quality.
You should check and replace your filters every month, especially when you’re using the heater a lot. Flat filters should be changed monthly, while pleated filters are usually good for about three months.
Fuel and ignition problems
No fuel, no heat. It’s pretty basic, but often overlooked. Here’s what to check, depending on what kind of heat you have.
Gas supply issues (for gas heaters)
First, make sure the gas supply valve is open. Then, take a look at the gas meter and gas lines to make sure there’s no visible damage. If you even suspect a gas leak, get everyone out of the house immediately and call the gas company or fire department. Don’t take chances with gas.
If you have an older gas heater, it may have a pilot light. If the pilot light goes out, the heater won’t ignite. You may be able to relight the pilot light yourself, but only if you’re comfortable doing so. Follow the directions on the heater exactly.
Oil supply issues (for oil heaters)
Check the oil tank level to be sure you have enough fuel. If the tank is low, schedule an oil delivery.
While you’re at it, take a look at the oil filters and fuel lines. If they’re clogged, that can also stop the heat. Cleaning or replacing oil filters and fuel lines may require the help of a professional, though, so don’t hesitate to call in an expert.
Blower motor and ductwork issues
If your furnace seems to be firing up okay but you’re not feeling any warm air coming through your vents, the problem may lie with the blower motor or the ductwork.
Malfunctioning blower motor
The blower motor is what pushes the warm air through your ductwork and out into your house. If it’s not working correctly, that warm air is just going to sit inside the furnace.
You may be able to tell if the blower motor is failing by listening for strange noises coming from the unit. You can also visually inspect the motor and its components for any obvious damage.
Blower motor repairs can be complex, so it’s usually best to call in a professional for this type of work.
Ductwork problems
Even if the blower motor is working fine, leaky or blocked ducts can reduce your heating efficiency. Check your ductwork for any visible leaks, holes, or disconnections. Seal any leaks you find with duct tape or mastic sealant.
Blocked ducts can also restrict airflow and cause uneven heating throughout your home. Take a look inside the ducts for any obstructions, like debris or collapsed sections.
Uh oh, what’s that smell? And what’s that noise?
A lot of people notice a burning smell when they turn on their heaters for the first time each fall. Usually, that’s nothing to worry about. It’s just dust burning off the heating elements. Open your windows and let the heater run for a little while, and the smell should go away.
However, if that smell hangs around, it could mean something’s actually burning, or that you have a gas leak. Turn off the heater and call a qualified HVAC technician immediately.
Also, pay attention to any strange noises your heater makes. Banging, rattling, or hissing are all signs that something is wrong. And again, any unusual odors could point to a gas leak or another dangerous situation, so it’s always best to have them checked out.
When to call a professional
Some heating problems are too complex for a DIY fix. Attempting repairs without the right training can be dangerous.
Call a professional HVAC technician if:
- you suspect a gas leak
- you’re dealing with electrical issues
- you’ve identified a complex mechanical failure
- you’ve tried troubleshooting, but the heat still doesn’t work
Scheduling regular HVAC maintenance can also prevent problems from developing in the first place. Maintenance can improve your heating system’s efficiency and extend its lifespan.
Frequently Asked Questions
How do I fix my house heater not blowing hot air?
First, check your thermostat to ensure it’s set to “heat” and the temperature is higher than the current room temperature. Inspect your air filter – a dirty filter restricts airflow and can cause overheating. Also, check your furnace’s pilot light (if applicable) and ensure it’s lit. If these steps don’t work, it might be a more complex issue requiring professional HVAC service.
Why is my heating not working at home?
Several factors could be at play. It could be a tripped circuit breaker, a malfunctioning thermostat, a gas supply issue, or a problem with the furnace itself. Start by checking the simple things like the thermostat and breaker box. If you’re not comfortable troubleshooting further, call a qualified technician to diagnose the problem.
Why is my house not feeling heat?
If your furnace is running but your house isn’t warming up, look for air leaks around windows and doors. Make sure your vents are open and unobstructed. Poor insulation can also contribute to heat loss. Consider sealing drafts, adding insulation, and ensuring your ductwork is properly sealed to maximize heat distribution throughout your home.
Summary
If your house isn’t heating up, you’ll want to troubleshoot the problem by checking the thermostat, air filter, pilot light, and circuit breaker. These simple fixes can often get the heat flowing again.
But remember, your safety always comes first. If you’re not comfortable with DIY repairs or if the problem is complex, call a qualified HVAC professional. Messing with gas lines or electrical components can be dangerous.
Regular maintenance is also key to a reliable heating system. Schedule annual checkups to catch small issues before they turn into big, expensive headaches. A little preventative care can keep your home warm and cozy all winter long.