Air Conditioning Repair and Heating Repair in Waltham
Cold air one day, warm air the next. If your air conditioner is not blowing cold air or your furnace will not ignite, our Waltham HVAC technicians find the real cause — not a guess — and quote a flat price before any work starts. Air conditioning repair and heating repair in Waltham is available same or next day in most cases, including nights and weekends at no overtime charge.
Every Waltham service call includes measured diagnostics — superheat and subcool, static pressure, temperature rise, capacitor microfarads and motor amp draw — written down and explained. That is how you avoid paying for parts your system never needed.
Same Day AC Repair in Waltham — What We Fix Most
- AC not cooling in Waltham or air conditioner not blowing cold air
- Air conditioner not working, tripping the breaker, or refusing to start
- AC frozen coil, iced refrigerant lines and airflow restrictions
- AC making noise — buzzing, screeching, clicking or banging
- AC compressor repair, capacitor, contactor and fan motor replacement
- Refrigerant leak detection and repair (never a blind top-off)
- Central air repair, condensate drain clogs and water leaks
- Thermostat faults, control board and wiring diagnostics
Heating Repair, Furnace Repair & Heat Pump Service in Waltham
- No heat in Waltham / heater not working
- Furnace not working, not igniting, or blowing cold air
- Furnace short cycling in Waltham and limit-switch lockouts
- Ignitor, flame sensor, inducer motor and gas valve repair
- Heat exchanger inspection with carbon monoxide safety testing
- Heat pump repair in Waltham — defrost boards, reversing valves, aux heat
- Furnace service, furnace tune-up and AC tune-up seasonal maintenance
- Affordable furnace repair plus honest replacement quotes
Emergency HVAC Services in Waltham — 24 Hours a Day
Heat waves and cold snaps do not keep business hours. Our Waltham emergency line is staffed by a live dispatcher 24/7 for emergency AC repair, 24 hour heating repair and same day HVAC repair. Households with infants, seniors or medical needs are prioritized during extreme weather. Call (551) 201-0721 and we will tell you honestly whether you need a truck tonight or a morning appointment.
Waiting for your technician in Waltham? Switch the system OFF (not just up) if you see ice on the coil, set the fan to ON, replace a dirty filter, close sun-facing blinds, and clear access to the outdoor unit and the attic or basement hatch. It often shortens the repair.
Why Waltham Chooses Citywide Express HVAC
- Licensed and insured HVAC contractor with background-checked technicians
- Upfront flat-rate pricing approved before work begins
- No overtime fees nights, weekends or holidays
- Measured diagnostics in writing — you see the readings
- Stocked trucks for first-visit repairs on common failures
- Free replacement estimates with Manual J load calculations
- Permits and code compliance handled for installations
- Workmanship guarantee and manufacturer warranty verification
Residential and Commercial HVAC in Waltham
We handle residential HVAC repair for single-family homes, condos, townhomes, apartments, mobile homes and rentals in Waltham, plus light commercial rooftop units and split systems for offices, retail, restaurants and warehouses. Property managers and landlords can set up priority accounts with consolidated billing.
Nearby Areas We Also Serve
Besides Waltham, our technicians cover Salem, Saugus, Somerville, South Easton, Springfield, Taunton and surrounding neighborhoods across Massachusetts.
AC Repair Salem, MAAC Repair Saugus, MAAC Repair Somerville, MAAC Repair South Easton, MAAC Repair Springfield, MAAC Repair Taunton, MAAC Repair Westfield, MAAC Repair Weymouth Town, MAAC Repair Woburn, MAAC Repair Worcester, MA AC Repair & Heating Repair FAQs for Waltham, MA
Do you offer same day AC repair in Waltham?
Yes. Same day AC repair in Waltham is available in most cases when you call early enough in the day, and next-day appointments are standard. Emergency air conditioning repair is dispatched 24 hours a day, 7 days a week. Call (551) 201-0721 and our dispatcher will give you a real arrival window.
Is there a 24 hour AC repair service near me in Waltham?
Our Waltham dispatch line is answered by a live person 24/7, including nights, weekends and holidays, for 24 hour AC repair, emergency heating repair and emergency HVAC repair. We do not charge overtime or after-hours premiums.
How much does AC repair cost in Waltham?
Most common AC repairs in Waltham run between $150 and $550 - capacitors, contactors, ignitors, sensors and thermostats. Larger jobs such as motors, coils, refrigerant leak repair or compressor replacement range from about $450 to $3,500. You get an exact flat-rate quote after diagnosis and before any work begins.
My AC is not cooling or not blowing cold air. What should I check first in Waltham?
Confirm the thermostat is set to COOL and below room temperature, replace a dirty air filter, check the indoor and outdoor breakers, and make sure the outdoor fan is spinning and the coil is not clogged. If the coil is iced over, switch the system OFF and the fan ON to thaw it, then call us - ice usually means low refrigerant or an airflow problem.
Do you handle heating repair and furnace repair in Waltham too?
Yes. We handle heating repair, furnace repair, heater repair, furnace tune-ups, heat pump repair and no-heat emergency calls in Waltham and throughout Massachusetts, including gas furnaces, electric furnaces, heat pumps and ductless mini splits.
Which brands do you service in Waltham?
All major brands, including Carrier, Trane, Lennox, Rheem, Ruud, Goodman, Amana, American Standard, York, Bryant, Payne, Coleman, Daikin, Mitsubishi, Fujitsu, LG and Bosch.
Do you offer free estimates on AC or furnace installation in Waltham?
Yes. AC installation, furnace installation, heat pump replacement and ductless mini split estimates in Waltham are free and include a load calculation, permit handling, rebate guidance and financing options.
Which nearby areas do you cover?
Along with Waltham we serve Salem, Saugus, Somerville, South Easton, Springfield, Taunton and surrounding Massachusetts communities.
