Repair or Replace HVAC in NH

Updated 2026-09-30

Repair versus replacement is a judgment about one machine in one house, not a slogan about age. This site will not tell you that every furnace older than a certain year must be replaced. We will not print a payback that assumes your fuel price. An independent contractor can quote both options after they see the equipment. Call (603) 420-0791 with your ZIP code and the symptom. Confirm license and insurance. You decide whether to book.

Repair is the right conversation when

The failure is a part that does not condemn the rest of the appliance. On an air conditioner that is a capacitor, a contactor, a fan motor, a thermostat, or a drain. On a furnace that is an igniter, a flame sensor, a filter, a blower capacitor, or a condensate trap. On a boiler that is a circulator, a zone valve, an aquastat, or an expansion tank. On a heat pump that is a sensor, a fan motor, or a board the manufacturer still sells. The system has been reliable, the heat exchanger or compressor is intact, and the refrigerant or the venting is supportable.

Ask the contractor to name the failed part and to say what they tested. A cleaning is not a repair. A refrigerant top-off without a leak search is not a finished repair.

Replacement is the right conversation when

The heat exchanger is cracked or the boiler sections leak. The compressor has failed on a system whose coil and refrigerant are already obsolete for a simple repair. The same major part has failed twice in a short span. The equipment cannot keep the house at setpoint even when it runs, and the cause is size or a dying compressor rather than a filter. You are already replacing the coil or the air handler and the outdoor unit is the same age. Venting for a modern furnace or boiler cannot be done safely with the chimney you have, and the appliance was due anyway.

Age alone is a weak reason. A fifteen-year-old furnace that has been maintained can be a better machine than a five-year-old unit that was installed badly. Condition, parts availability, and safety come first.

The questions that keep the quote honest

What did you find, and what did you rule out? What does the repair quote include, and what does the replacement quote include that the repair does not? What is reused: ducts, line set, pad, thermostat, flue, oil tank? What is the warranty on the repair part versus the new equipment, and who honors it? If I repair it, what failure would make you tell me to stop spending? Will the new system need an electrical or venting change the headline price left out?

If the answers are vague, do not sign on the truck. A no-heat night is a bad moment to buy a system you do not understand. Temporary heat that is safe, and a visit tomorrow, is allowed. You are not rude for asking for it.

Efficiency and rebates are not the decision

A new heat pump may qualify for an NHSaves rebate. That rebate does not make a repair unsafe or a replacement necessary. Read rebates only after you know the old equipment can or cannot be saved. Operating cost comparisons belong in heat pump versus oil or propane, with your bills, not with a percentage from a salesperson.

Safety stops the debate

Gas odor, a yellow flame you were told is wrong, soot, a relief valve that is lifting, or a heat exchanger the contractor believes is cracked: stop using the appliance if they tell you to stop. Replacement or a serious repair is a safety call then, not a comfort call. For a suspected gas leak, leave and use the utility emergency number.

How this site fits

We connect the call. We do not score the equipment and we do not take a commission that we are going to pretend is a discount. The contractor quotes the repair and, if you ask, the replacement. You can get a second opinion. Related pages: AC repair, furnace repair, furnace replacement, heat pump repair, and boiler replacement. People in photographs are actors or models.

Second opinions without drama

On a repair under a few hundred dollars, a second opinion can cost more than the part. Use your judgment. On a replacement, a second visit is reasonable. Give the second contractor the same facts and, if you have it, the first contractor's written diagnosis. You are not required to hide the first quote. You are required to compare scope. If the second contractor disagrees about a cracked heat exchanger or a grounded compressor, ask what test each one did. "It looks old" is not a test.

Do not sign a financing plan you do not understand in order to end a no-heat day. Financing is a separate product from the equipment. The monthly payment is not the price. If you need a night to read the quote, take the night, and use safe backup heat if you have it. A serious contractor can hold a quote until the next day.

Write the decision down. 'Repair the inducer now, revisit replacement if the heat exchanger fails or if another major part fails within two years' is a plan. 'The technician said it was old' is not a plan. Plans survive a second opinion and a night's sleep. They also keep a future contractor from selling you the same replacement twice. File the invoice with the model numbers. If you choose replacement, ask the new quote to state what problem it solves that the repair did not. If that sentence is missing, you are buying equipment, not a solution. Both can be legitimate. They should not be confused with each other.

If you are comparing a repair today with a replacement next year, ask what maintenance would keep the repair credible until then. A repaired furnace with a dirty filter and no fall visit is not a fair test of the repair. A replacement with no load calculation is not a fair test of the new equipment either. Hold both options to a written scope. Then choose. Call (603) 420-0791 to reach an independent contractor who will put that scope in front of you. Confirm insurance before work starts.

When to repair or replace HVAC in New Hampshire