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

If your heater is not working in your house, check a few simple items first and schedule professional service if it still won’t run. The most common culprits are thermostat settings or a tripped breaker, followed by a clogged air filter or a full condensate drain that trips a safety switch. A technician sees this often: a stuck float switch can stop heat with no obvious warning on the thermostat. We help homeowners across the Winter Park area with same-day and 24/7 emergency support when basic checks don’t restore heat.

Try these quick, safe checks before you call:

• Set thermostat to Heat and a few degrees above room temperature; replace thermostat batteries.
• Verify the furnace/air handler switch is On and reset a tripped breaker once after waiting 5 minutes.
• Replace a dirty air filter and make sure supply and return vents are open.
• If accessible, power off and look for a full condensate pan or float switch trip; don’t bypass safety devices.

If you smell gas, hear electrical arcing, or see scorch marks, keep power off and call a licensed technician immediately.

Updated: 2026-06-22

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