Heat pump or furnace? That is the first thing that matters when the heat quits in Dover, NH, because the two fail in completely different ways. Heat pumps tend to ice over when defrost stops working, get stuck in cooling when a reversing valve fails, or quietly lean on the electric backup strips, at several times the normal operating cost, when the outdoor unit dies. Gas furnaces usually come down to the flame sensor: once oxide coats it, the burners light but the flame cannot be proven, so the board cuts the gas and locks out after three tries. After that, the usual suspects are cracked hot surface igniters, stuck pressure switches, clogged condensate traps on high-efficiency models, and blower motors at the end of their life.
Fault codes are where our diagnosis starts, not where it ends. On every no-heat call, Dover HVAC confirms the board's story with measurements: flame signal read in microamps, igniter resistance checked, the pressure switch tested against real inducer draft, capacitors and motors metered, and, on heat pumps, refrigerant charge and defrost operation verified. Any visit that touches the gas side also covers the safety basics. We leak-test the connections, look over the heat exchanger, and confirm the flue is drafting, since a repair that has not been proven safe is not a finished repair.
Furnace, heat pump, air handler, boiler, or ductless unit, and whatever brand is on the nameplate, we service it. Stocking igniters, flame sensors, capacitors, inducer motors, and blower motors on every truck means heat usually comes back on the first trip. And if a repair no longer makes sense for aging equipment, we tell you so honestly and lay out the options with real numbers. Call (351) 345-9323 for heating repair anywhere in Dover, and an experienced technician will head your way today.
Most of our service calls are for Furnace Repair in Dover. If something has stopped working, start there.
When to Call for Heating Repair in Dover
Recognizing the warning signs early can save you time, money, and prevent significant damage to your property. Keep an eye out for the following clues that it's time to bring in an expert:
- The furnace clicking and trying to light but shutting back down
- Higher heating bills with less comfort to show for them
- No warm air at the registers even with the heat turned up
- The system starting and stopping every few minutes without warming the house
- A loud boom when the burners light, which points to delayed ignition
- Some rooms warm while others stay stubbornly cold
- A heat pump's outdoor unit encased in frost or ice
- Burning, musty, or rotten-egg odors when the heat runs
Act Before It Gets Worse
What seems like a minor issue today can take out a compressor or heat exchanger tomorrow. Call Dover HVAC at (351) 345-9323 at the first sign of trouble.
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Why Professional Heating Repair Matters
Heating repair carries more risk than any other job in home comfort work because combustion is involved. A furnace that lights late booms gas vapor inside the heat exchanger and stresses the metal; a heat exchanger that cracks can pass combustion gases into the supply air; a flue that has stopped drafting sends carbon monoxide into the house instead of out of it, and none of these announce themselves in ways an untrained eye can catch. The diagnostic terrain is genuinely tricky too: a furnace that short-cycles might have a failing limit switch, or it might be protecting itself from a clogged filter, and cleaning a flame sensor without asking why it fouled leaves the next lockout already scheduled.
Instruments and judgment are what our experienced technicians bring to both sides of that problem. We measure the flame signal instead of assuming it, inspect the heat exchanger, verify draft at the flue, and check temperature rise against the data plate so blower speed and burner output are matched. With heat pumps, the defrost board, sensors, and reversing valve get tested before anyone condemns a compressor, and we look at whether the backup strips have been quietly inflating your bill for weeks. Every repair we finish is proven safe and correct over a full heating cycle, which is the standard you should expect from anyone working on the equipment that keeps your family warm.
Our Heating Repair Process
We follow a proven process to ensure every repair and installation is completed to the highest standards. Here's how we handle heating repair from start to finish:
Diagnosis & Safety Inspection
We pull the fault codes, then verify: flame signal, igniter resistance, pressure switch operation, motor and capacitor health, and charge and defrost on heat pumps, with gas connections leak-tested as standard.
Clear Findings & Upfront Quote
You see the failed part and hear precisely why it failed, then get a firm price before any work starts. When a cracked heat exchanger or failed compressor makes replacement the smarter move, we tell you directly.
Same-Visit Repair
Igniters, flame sensors, pressure switches, capacitors, and motors ride on our trucks, so most heating repairs are completed the same visit and the house starts warming before we leave.
Complete System Check
We run complete heating cycles, measure temperature rise against the data plate, confirm safe combustion and draft on fuel-fired equipment, and verify every safety control before we go.
Not Sure What You Need?
Our experienced technicians can assess your situation and recommend the best solution.
Call (351) 345-9323 NowHeating Repair Prevention Tips
A little routine maintenance goes a long way toward avoiding a mid-season breakdown. Start with these practical measures our team relies on:
- Swap the filter every month while the heat is running, since restricted airflow trips limits and shortens heat exchanger life
- Schedule a professional tune-up every fall before the first cold snap finds the weak parts
- Give the outdoor heat pump unit open space, free of snow drifts and plantings, so it can defrost
- Move solvents, paints, and pool or laundry chemicals away from the furnace to protect the burners from corrosive vapor
- Keep the area around the furnace clear so the burner gets adequate combustion air
- Install a CO detector on each floor and test them every month
- Take booming ignition or new rattles seriously; both are cheap to fix early and expensive late
Comparing DIY and Professional Heating Repair
While some minor tasks like changing filters or checking a thermostat can be handled by homeowners, most HVAC work involves refrigerant, gas combustion, and high-voltage electricity, jobs that call for professional expertise. Here's a comparison:
| Factor | DIY Attempt | Professional Service |
|---|---|---|
| Carbon Monoxide | No way to detect a CO problem | Exchanger inspected, flue draft confirmed |
| Troubleshooting | Error code guessing games | Readings taken before parts are replaced |
| Gas Safety | Fittings tightened and trusted | Every joint checked with a leak detector |
| Heat Pump Faults | Defrost problems misread as total failure | Each defrost component checked in turn |
| Underlying Cause | Quick fix, same failure next week | The fault behind the fault diagnosed |
| Verification | It lit once, good enough | Complete cycles tested against the data plate |
Schedule Your Heating Repair Service
Every day you wait puts more strain on a struggling unit. Get Dover HVAC on the job today.
Get Help: (351) 345-9323Areas We Serve for Heating Repair
Wherever you are in the area, the same experienced team handles your heating repair. Find your community below.