What Should I Do If My Heater Is Not Working in My House?

If your heater is not working, start with simple checks at home and then call for service if it still won’t run. The most common cause is an incorrect thermostat setting or a tripped breaker; a clogged air filter can also overheat the unit and shut it down until it cools. Our team handles these no-heat calls across the Columbia area regularly and can advise you on repair versus replacement after a quick diagnosis. If it still won’t start after the steps below, professional help is the right next move, and emergency support is available 24/7 with no after-hours fees.

Try these quick checks:

• Set thermostat to Heat and raise the setpoint 5 degrees.
• Confirm the furnace/air handler switch and breaker are ON.
• Replace a dirty filter to restore airflow.
• Clear a full condensate pan or drain if you see water present.

If you smell gas, leave the home and call your utility emergency line before any HVAC service. <br/> Updated: 2026-04-01 <br/> Need help in Columbia, SC? Call (803) 888-4115 or book online. “Michael arrived early and got some heat going.” — Lynn T.