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

Most no-heat calls come from simple issues: incorrect thermostat settings, a tripped breaker, or a clogged air filter. Other common causes include failed igniters or pilot lights, safety switch lockouts, blocked vents or flues, fuel supply problems, and heat pump issues like iced outdoor units or low refrigerant. We service furnaces, boilers, and heat pumps in Lynn and nearby North Shore towns. Same-day service is available. A technician will diagnose and confirm repair costs on site.

• Set thermostat to Heat and 68–72°F.
• Replace or clean the filter.
• Check the furnace switch and breaker.
• Open supply vents and clear outdoor unit.
• For gas, confirm the supply valve is open.

<br/><br/> Updated: 2025-12-13 00:00:00 <br/><br/> Need help in Middleton, MA? Call (978) 716-5703 or book online.

"They came out multiple times until our heating system was fixed." — Kylee L.