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Learning About Commercial HVAC Systems
Warm Up Your Winter: How to Fix a Heating System Blowing Cold Air
Isaiah Chapman
There's nothing quite as frustrating as a heating system that decides to blow cold air in the middle of winter. This issue can be caused by various problems, some of which you can troubleshoot yourself. This blog post will guide you on how to fix a heating system that's blowing cold air.
1. Check Your Thermostat
The first thing you should do is check your thermostat settings. It may sound simple, but sometimes the solution is as straightforward as switching your system from 'cool' to 'heat'. Also, ensure the fan setting is on 'auto' rather than 'on', which could cause your system to blow cold air when heating cycles are off.
2. Replace the Air Filters
Clogged or dirty filters restrict airflow over the heat exchanger, causing it to overheat and shut off prematurely. This can make it seem like your furnace is blowing cold air. Check your air filters, and if they're dirty, replace them.
3. Inspect the Pilot Light
If you have an older gas furnace, check the pilot light. If it's out, your furnace won't produce warm air. Follow your owner's manual instructions to relight it safely. If it doesn't stay lit, you may have a faulty thermocouple or a problem with your gas supply. In this case, it's best to call a professional.
4. Check the Fuel Source
Your heating system might be blowing cold air if it isn't receiving the fuel it needs. If you have a gas furnace, check to ensure the gas valve is fully open. For an oil furnace, you might need to refill your oil tank.
5. Inspect the Ductwork
Sometimes, the problem lies not with the furnace itself but with the ductwork. Leaks or gaps in the ducts can let in cold air. Inspect your ductwork for any signs of damage and seal any leaks using a mastic sealant or metal tape.
6. Reset the Circuit Breaker
If your furnace isn't getting power, it might start blowing cold air. Look at your electrical panel and see if the circuit breaker for your furnace has tripped. If it has, turn it off and then back on. If it trips again, you might have an electrical problem and should call a professional.
7. Call a Professional
If you've tried the above steps and your heating system is still blowing cold air, it's time to call a professional for a heating system repair. There might be a more complex issue at hand, such as a problem with the blower motor or heat exchanger.
While it's frustrating to have a heating system blowing cold air, especially during the colder months, there are several steps you can take to identify and potentially resolve the issue. However, if these troubleshooting tips don't solve the problem, don't hesitate to call an HVAC professional. They can diagnose and fix the issue ensuring your home stays warm and cozy all winter long.
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