Heating Repair and Installation Across Delmarva
Furnaces have a way of conking out right smack in the middle of the coldest night of the year. Call or text and somebody picks up. We work on gas, oil, heat pumps, and boilers, and we have been doing it out of Hartly since 1989.
Everything That Heats a Delaware House
Kent County and the Eastern Shore are a mixed bag. Gas in the developments, oil in the older farmhouses, heat pumps in most of what has gone up in the last twenty years, and boilers in a fair number of homes around Dover and the historic districts. We service all of it.
Gas Furnaces
Repair, replacement, and annual tune-ups. Ignitors, flame sensors, inducer motors, control boards, and the heat exchanger inspection that actually matters for safety.
Heat Pumps
The most common system in newer Delaware homes. Defrost problems, reversing valves, auxiliary heat that will not stop running, and full replacements.
Boilers
Hot water and steam. Circulators, expansion tanks, zone valves, and low water cutoffs on the older systems around Dover.
Oil Service
Plenty of farmhouses out here still run oil. Nozzles, electrodes, pumps, and the annual cleaning that keeps an oil burner honest.
When the Heat Quits
Before you call, two things are worth thirty seconds. Check that the thermostat is calling for heat and has good batteries, and check that the furnace switch, which looks exactly like a light switch on the wall beside the unit, did not get flipped off by somebody carrying laundry. It happens more than you would think.
Past that, here is what we usually find.
- It runs but blows cool air. On a furnace, often a flame sensor coated in carbon or a failed ignitor. On a heat pump, often a system stuck in defrost or short on refrigerant.
- It clicks and will not light. Ignitor, gas valve, or a safety lockout that is doing exactly what it should because something else is wrong upstream.
- It short cycles. Usually a dirty filter choking airflow, or a limit switch tripping on high heat because the system cannot breathe.
- The backup heat runs constantly. On a heat pump this is the expensive failure mode. Electric auxiliary heat costs a fortune, and if it is running in forty degree weather something is wrong.
- Rumbling, banging, or a smell of gas. Shut it off and call. Do not troubleshoot a gas smell.
Cracked heat exchanger is not a scare tactic, but it is often used as one
It is a real and serious failure that puts combustion gases into the air you breathe. It is also the single most abused upsell in this trade. If somebody tells you yours is cracked, ask them to show it to you on camera. Ours will.
Heat Pump or Furnace in Zone 4A?
Delaware sits in ASHRAE climate zone 4A. Cold enough to matter, mild enough that a modern heat pump is genuinely viable, which was not true of the equipment your parents had.
A cold-climate heat pump handles the overwhelming majority of our heating season efficiently, and it gives you cooling from the same box in July. The catch is the handful of nights each winter when it drops far enough that the heat pump leans on auxiliary electric heat, which is expensive.
That is why dual fuel exists. Pair a heat pump with a gas furnace, let the heat pump carry the shoulder seasons and most of winter, and let the furnace pick up the coldest stretches. You get the efficiency most of the year and the brute force when you need it.
Which one is right depends on your ductwork, your insulation, whether gas is already at the house, and what you pay for electricity. We look at the house before we recommend anything, because your house is not your neighbor's house.
Replacement, Done Properly
A heating system is only as good as the install. We size on a load calculation rather than copying whatever tonnage was there, we check the ductwork, and we commission the system before we leave: gas pressure verified, airflow measured, temperature rise inside the manufacturer's range, safeties tested.
Air Doctorx is a Trane Comfort Specialist and a Diamond Elite Mitsubishi Dealer, and we hold Delaware license #36081. Rebates through Energize Delaware and Delmarva Power apply to qualifying high-efficiency equipment, and we help our customers qualify. See financing and rebates for the details.
The Annual Tune-Up Is Not Optional on Heating
With cooling, skipping maintenance costs you efficiency and equipment life. With heating, it also costs you a safety inspection. Combustion equipment deserves a set of eyes on it once a year: heat exchanger, flue, gas pressure, carbon monoxide check, and the safeties that are supposed to shut the thing down if something goes wrong.
The Comfort Protection Plan covers two visits a year, one for heating and one for cooling, at $249 per system. It also puts you at the front of the line in January, which is worth more than the discount.
Heating Questions From Around Delmarva
In our zone 4A climate a modern cold-climate heat pump handles most winters efficiently, and dual fuel setups pair a heat pump with a furnace for the coldest snaps. We assess your home's layout, ductwork, and load requirements before recommending either.
Heat pump supply air runs cooler than furnace air by design, usually in the high nineties rather than the one twenties. It feels lukewarm against your hand even when the system is working correctly. If the house is actually not holding temperature, that is different, and worth a service call.
Yes. There are a lot of oil-fired systems in the older houses around Hartly, Marydel, Harrington, and out toward the Maryland line. We service and replace them, and oil systems get their own maintenance pricing because the annual cleaning is more involved.
Once a year, in the fall before you need it. On combustion equipment this is a safety inspection as much as a performance one. Skipping it is also the fastest way to give a manufacturer grounds to deny a warranty claim.
It is normal during defrost cycles and in genuinely cold weather. It is not normal at forty degrees. Constant auxiliary heat usually means low refrigerant, a failed reversing valve, or a thermostat wired or configured wrong, and it will show up on your electric bill fast.
Yes. Air Doctorx keeps 24/7 on-call support for heating and cooling emergencies across Delaware and the Eastern Shore. Call or text (302) 492-1333 any time.
A Customer of Many Years
"They upgraded my thermostat so my heat pump would work. Ken was very thorough and explained the work when he was done. Steve followed up the next day. They have handled my heat and AC systems in our rentals and primary home for years."