Heating Repair Services

Factory-Trained Technicians

Warrantied Labor and Equipment

24-Hour Emergency Services

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on New Construction and System Replacement

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Signs Your Heater Needs Repair

Heating systems often give subtle warnings before breaking down. Look out for these signs:


  • Noisy Operation: A healthy system should emit a soft hum with quiet clicks at the start and end of a cycle. Loud banging, whistling, or buzzing may indicate loose, unlubricated, or broken parts.
  • Irregular Cycles: If your heater runs continuously or stops before reaching the thermostat setting, it may need repairs.
  • Persistent Chill: If your home stays cold despite the heater running, your system might not be functioning efficiently.
  • Sinus Issues: Excess dust and debris in your HVAC system can circulate through your home, leading to sinus irritation.


A professional repair service can diagnose and fix these issues, restoring your indoor comfort.


Comprehensive Heating System Repairs

Great Mills Heating and A/C has extensive experience handling various heating issues in both homes and businesses. Common problems we address include:


  • Dirty Flame Sensors & Pilot Lights: These can be cleaned or replaced to restore proper function.
  • Furnace Belt Issues: A broken or stretched belt can disrupt operation and may need replacement.


Different heating systems require specific repairs. Here’s how we can help:


  • Furnace Repair: Components like flame sensors and pilot lights can become coated with ash, preventing proper ignition.
  • Heat Pump Repair: Refrigerant leaks can cause the air to feel cold instead of warm. We’ll check for leaks and refill the refrigerant.
  • Ductless Mini-Split Repair: Clogged drainage lines can lead to water buildup. Our technicians will clear blockages to ensure proper drainage.


No matter what type of heating system you own, we have the expertise to fix it!

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Professional Repair and Replacement for Your Heating Systems

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2-Year Warranty

Great Mills Heating & A/C, Inc offers a standard two-year labor warranty on residential equipment. Call for details.

(301) 507-4054

(301) 507-4054
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