HVAC · Portsmouth, NH

HVAC Repair Costs

Heating, cooling, and ventilation equipment. Estimates below are localized to labor and material rates in the Portsmouth, NH area (zip prefix 038). Enter your exact zip to refine.

Showing local estimates for Portsmouth, NH (03801)

Major$4,424 – $13,271

Boiler - end of life

Replace boiler

Major$4,424 – $11,059

Heat pump - end of life

Replace heat pump

Major$3,318 – $8,847

Furnace - end of life

Replace furnace

Major$3,318 – $8,847

Furnace - cracked heat exchanger

Replace furnace (not repairable)

Major$2,765 – $7,741

AC condenser - end of life

Replace AC condenser unit

Moderate$239 – $1,794

Ductwork leaking/disconnected

Seal or reconnect ductwork

Moderate$179 – $1,794

AC not cooling properly

Diagnose and repair (refrigerant/coil/etc.)

Minor$236 – $1,182

Ductwork not insulated (in uncond. space)

Insulate accessible ductwork

Major$239 – $957

Flue/vent pipe improper installation

Correct flue pipe installation

Minor$112 – $560

Baseboard heater damage/not working

Repair or replace baseboard heaters

Moderate$118 – $590

Combustion air supply inadequate

Add combustion air vent

Minor$118 – $472

Fireplace damper not working

Repair or replace fireplace damper

Minor$123 – $368

Gas fireplace - service needed

Professional gas fireplace service

Minor$55 – $332

Thermostat not working properly

Replace thermostat

Major$92 – $368

Gas line not capped/improper connection

Cap or repair gas line

Minor$61 – $303

Condensate drain line clogged/missing

Clear or install condensate drain

Minor$30 – $118

AC refrigerant line insulation missing

Re-insulate refrigerant lines

Minor$5 – $32

Furnace - dirty/clogged filter

Replace furnace filter

About These Estimates

These estimates are based on national averages adjusted for local labor and material costs using BLS and BEA data. Actual costs vary based on specific conditions, contractor availability, and project complexity. Always obtain multiple quotes from licensed local contractors.