Heater Not Keeping House Warm: Here Are 11 Possible Reasons Why

A man in a parka adjusting the thermostat

Hello again, Colorado neighbors! As the chill of the season sets in, there’s nothing more frustrating than a heater not keeping the house warm. If you’ve ever found yourself wrapped in blankets, wondering, “Why isn’t my house heating up?”, you’re not alone. Let’s explore some possible reasons why your house might not be heating up to temperature.

1. Dirty Air Filters

One of the most common culprits when a heater isn’t working efficiently is dirty air filters. These can restrict the flow of heated air into your home. Remember, regular checks and replacements are essential for smooth HVAC system operation.

2. Pilot Light Troubles

Your furnace’s pilot light is a small flame that’s always burning. If it goes out, your heater won’t keep up, and your house won’t heat up. If you’re comfortable, you can try relighting it. If not, professional HVAC assistance might be required.

3. Heat Exchanger Issues

The heat exchanger is vital for warming the air in your home. If it’s damaged, not only will your heater not keep your house warm, but it could also release carbon monoxide, a dangerous gas. Always get a suspected issue with this component checked immediately.

4. Blower Motor Malfunctions

The blower motor propels the heated air throughout your home. If it’s malfunctioning, your house might not heat up, causing your heater not to keep up with the cold weather outside.

5. Thermostat Troubles

Sometimes, the issue isn’t with the heating system itself but with the programmable thermostat. Ensure it’s set correctly, and if it won’t turn on or adjust, it might be time for a replacement or furnace repair.

6. Short Cycling

If your heater turns on and off frequently without fully heating your home, it’s called short cycling. This could be due to a myriad of reasons from overheating to a malfunctioning heat exchanger.

A woman sitting in a cold house in a blanket

7. Air Conditioning Mix-Up

Sometimes, the simple reason your house is not heating up is that the air conditioning is accidentally turned on. Double-check your HVAC system settings to ensure you’re not mistakenly cooling instead of heating!

8. Faulty Heat Pump

Heat pumps are great for both cooling and heating your home. However, if it isn’t working, it might fail to bring the temperature in your home to a cozy level. Regular maintenance by HVAC technicians can ensure it’s in top shape.

9. Old or Inefficient Systems

Like all things, heating systems age. An older system might struggle in extreme cold or might be less efficient. It might be time to consider an upgrade if your system is nearing the end of its lifespan.

10. Improper Insulation

One reason your house is not heating up to the temperature you want could be insufficient insulation. No matter how efficiently your heating system runs, if your home isn’t well-insulated, that precious warm air will escape quickly. Check your windows, doors, and attic spaces to ensure they’re properly sealed and insulated.

11. Blocked or Closed Vents

It might seem basic, but sometimes the simple reasons escape our attention. Ensure all vents in your home are open and not blocked by furniture or curtains. Closed or obstructed vents can significantly reduce the efficiency of your HVAC system, causing your house not to heat up as desired.

The Bottom Line

If you’ve ever thought, “My heater is not working as it should,” or “Why isn’t my house heating up?”, there are various potential causes. From pilot light troubles to a confused HVAC system, the reasons can vary. Remember, while some issues can be a DIY fix, others, especially those involving carbon monoxide risks, should be left to the professionals.

Stay warm and cozy, Denver! And if ever in doubt, reach out to your trusted HVAC technicians. Your comfort and safety are our top priorities!

Count on us for all your heater needs!

Need HVAC Service?

Contact the experts at Southwest Heating & Cooling.

Call us at (303) 791-2679!