What Are Common Reasons My Heater Is Not Working in My House?

Common reasons a home heater won’t run include incorrect thermostat settings, a tripped breaker or furnace switch, a clogged air filter, ignition or flame sensor issues, and a failed control board. We service furnaces, boilers, and heat pumps in Elkhart, South Bend, and Mishawaka, and offer 24/7 emergency repair.

Quick checks:

• Set thermostat to Heat and raise 3–5°F.
• Replace a dirty filter.
• Confirm the furnace switch and breaker are on.
• Make sure return and supply vents are unblocked.

Updated: 2025-12-17 00:00:00

Need help in Edwardsburg, MI? Call (574) 367-8549 or book online.

"He replaced a faulty control board and we had heat again." — Mark W.

Internal link: See our heating services page. https://summersphc.com/elkhart/