HVAC Repair in Bath, ME
Homes here need heat from September through May and cooling from July through August. If your system quits, tell us what it's doing and a licensed contractor who covers Sagadahoc County will get in touch.
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Nine months of heat, and not much room for error
Your furnace or boiler runs from September through May here. On winter nights that average 16°F, it's cycling on and off for hours at a stretch, and every start puts wear on the igniter or the pilot assembly. If you heat with fuel oil, a clogged nozzle or a dirty filter shows up fast, as short cycling or a system that won't fire at all.
Summer is short here, just July and August, with afternoons around 76°F. Your air conditioner or heat pump doesn't run long each year, and a unit that sat all winter can develop a refrigerant leak or a seized fan motor you won't notice until the first hot day. Sagadahoc County has seen 40 winter storms and 24 damaging wind events over the past ten years, and outages that follow can shut a heating system down cold. If your thermostat or furnace controls don't come back on their own once power returns, that's worth checking before the next storm knocks it out again.
- 9 months
- September through May, your system heats
- 2 months
- July through August, it cools
- 16°F
- the average winter night it heats against
- 76°F
- the average summer afternoon it cools against

NOAA nClimDiv, 1991–2020 normals
- Why is my heat not working?
- Start with the thermostat. Check that it is set to heat and the temperature is set above the room temperature, and check the batteries if it uses them. If the thermostat looks right, check your breaker panel, since a tripped breaker will shut the whole system down. With over half of homes here heating with fuel oil, an empty tank will also stop heat cold, so check the gauge if that's your setup. If all of that checks out and you still have no heat, especially with winter nights here averaging 16°F, that's worth a same-day call.
- Why is my system running but not cooling the house?
- The most common cause is a dirty air filter blocking airflow, so check that first and replace it if it looks gray or clogged. Next check that the outdoor unit isn't blocked by plants, leaves, or debris, since it needs open airflow to release heat. If the filter is clean and the outdoor unit is clear but the air coming from your vents isn't cold, the system likely needs a contractor to look at it. Running but not cooling often points to something low on refrigerant or a frozen coil, and neither of those is a homeowner fix.
- What can I check before calling for HVAC repair?
- Check the thermostat settings first, including the mode, the temperature, and the batteries if it has them. Check your breaker panel for a tripped breaker, since storms are common here and can knock power out or cause a trip when it comes back on. Check the air filter and replace it if it's dirty, since a clogged filter can cause both heating and cooling problems. If your outdoor unit is covered in snow, ice, or debris, clear it if you can safely reach it. Once you've checked those, a contractor can focus on the actual problem instead of the basics.

