Furnace Not Turning On? Troubleshooting Guide for Bucks County Homes
Summary: Furnace won't turn on? Safe checks in order: thermostat settings and batteries, breaker and furnace switch, clogged filter, igniter and flame sensor. Symptom-to-cause table, typical repair costs, and when to call for same-day service.
Furnace Won't Start: Common Causes and Repair Costs
| Symptom | Likely cause | Typical repair cost |
|---|---|---|
| Nothing happens at all | Thermostat, breaker, or furnace switch | DIY check first |
| Clicks but never ignites | Failed hot surface igniter | $150 to $300 |
| Ignites then shuts off | Dirty flame sensor | Cleaning or minor service |
| Hums but no airflow | Blower motor | $400 to $700 |
| Random lockouts, error codes | Control board | $400 to $800 |
LegendAir's $99.99 trip charge is applied toward the repair. Same-day service available in Bucks and Montgomery County.
Frequently Asked Questions
- Why is my furnace not turning on?
- The most common causes are a thermostat set wrong or with dead batteries, a tripped breaker or switched-off furnace power switch, a clogged filter triggering the limit switch, a failed hot surface igniter, or a dirty flame sensor. Work through the safe checks first, then call LegendAir at (215) 317-6099 for a same-day diagnosis.
- How much does it cost to fix a furnace that won't start?
- In Bucks County, an igniter replacement typically runs $150-$300, flame sensor service less, a blower motor $400-$700, and a control board $400-$800. LegendAir's $99.99 trip charge is applied toward the repair. Call (215) 317-6099.
Written by the NATE-certified technicians at LegendAir Heating & Cooling in Warminster PA.
Need HVAC service? Call (215) 317-6099 or book online.