HVAC · Frederick, MD

HVAC Repair Costs

Heating, cooling, and ventilation equipment. Estimates below are localized to labor and material rates in the Frederick, MD area (zip prefix 217). Enter your exact zip to refine.

Showing local estimates for Frederick, MD (21701)

Major$4,300 – $10,725

Heat pump - end of life

Replace heat pump

Major$4,825 – $10,175

Boiler - end of life

Replace boiler

Moderate$1,550 – $9,925

Reconnect or replace ductwork runs

Reconnect disconnected runs or replace damaged duct sections

Major$4,825 – $9,125

Furnace - cracked heat exchanger

Replace furnace (not repairable)

Major$4,300 – $8,575

Furnace - end of life

Replace furnace

Major$3,225 – $6,975

AC condenser - end of life

Replace AC condenser unit

Moderate$550 – $4,375

Duct sealing / plenum service

Seal ductwork and plenums (manual mastic/tape or Aeroseal aerosol)

Moderate$650 – $2,725

AC coil or major component replacement

Replace evaporator coil, condenser coil, or compressor

Moderate$325 – $1,675

Seal leaking ductwork

Mastic or foil-tape sealing of accessible duct joints and plenums

Minor$200 – $975

Ductwork not insulated (in uncond. space)

Insulate accessible ductwork

Major$225 – $875

Flue/vent pipe improper installation

Correct flue pipe installation

Moderate$175 – $650

AC refrigerant recharge / minor repair

Diagnose and recharge refrigerant, replace capacitor or contactor

Minor$75 – $575

Inaccessible ductwork - inspection/scope

Diagnostic access, camera, or pressure test when ductwork cannot be visually inspected

Minor$100 – $550

Baseboard heater damage/not working

Repair or replace baseboard heaters

Moderate$100 – $550

Combustion air supply inadequate

Add combustion air vent

Minor$100 – $450

Fireplace damper not working

Repair or replace fireplace damper

Minor$100 – $325

Gas fireplace - service needed

Professional gas fireplace service

Major$75 – $325

Gas line not capped/improper connection

Cap or repair gas line

Minor$50 – $325

Thermostat not working properly

Replace thermostat

Minor$50 – $275

Condensate drain line clogged/missing

Clear or install condensate drain

Minor$25 – $100

AC refrigerant line insulation missing

Re-insulate refrigerant lines

Minor$0 – $25

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.