Common heater failures include thermostat problems, a clogged air filter, a tripped breaker or switch, and ignition or flame-sensor issues. Heat pumps can also stop heating due to outdoor unit freeze or control faults. Sierra Air Conditioning & Plumbing offers 24/7 emergency service and same-day options, and we perform expert diagnostics and on-the-spot repairs. Ask about our $149 Heating System Tune-Up and S.A.M. plan for ongoing heating maintenance.
Quick checks:
- Confirm thermostat mode, settings, and batteries.
- Replace a dirty filter.
- Check the furnace switch and breaker.
- Verify vents are open and unblocked.
Updated: 2025-12-18 00:00:00
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