Furnace Repair
A furnace that stops heating is one of the most urgent home repair calls in cold weather. Call and describe what the furnace is doing, and you will be connected with an independent HVAC professional serving your area.
Your call is connected to an independent HVAC contractor, subject to availability in your area. HVAC Nation may receive compensation when your call is connected with a participating provider. Providers are independent businesses.
Common signs
- The furnace runs but blows cold or lukewarm air
- The burners will not ignite, or ignite and shut off quickly (short cycling)
- Banging, screeching or rattling from the furnace cabinet
- The blower runs nonstop or never turns on
- A yellow, flickering burner flame instead of a steady blue one
- The thermostat calls for heat but nothing happens
What the technician typically checks
An HVAC technician typically checks the thermostat signal, air filter, igniter or pilot, flame sensor, gas valve, inducer and blower motors, limit and pressure switches, and the venting, then explains what failed and the options for repair.
Before you call
Check that the thermostat is set to heat and above room temperature, that the furnace power switch is on, that the breaker has not tripped, and that the air filter is not clogged. If you smell gas, leave the home right away and call the gas utility or 911 from outside.
Related heating and cooling services
- Furnace Replacement: Old, unsafe or repeatedly failing furnaces that may need replacing.
- Heating Repair: Any home heating problem: furnaces, heat pumps, boilers and thermostats.
- Central Heating Repair & Service: Whole-home heating systems that will not heat evenly or reliably.
- Heating System Replacement: Replacing an aging furnace, boiler or heat pump, or switching system types.
- Boiler Repair: Cold radiators, pressure problems, leaks or a boiler that locks out.
- Radiator Repair: Heating radiators and baseboards that stay cold, leak or bang.
- Heat Pump Repair: Heat pumps that will not heat or cool, ice up, or run on backup heat.
- Heat Pump Installation: Adding or replacing a central heat pump for heating and cooling.
- AC Repair: Warm air, weak airflow, leaks, ice on lines or an AC that will not start.
- AC Installation: Adding central air to a home, or a new system in a new space.
- AC Replacement: Old, failing or repeatedly repaired air conditioners.
- HVAC Repair: Heating or cooling, ducts, thermostats and controls: one call for any HVAC problem.
- Thermostat Repair & Installation: Blank, unresponsive or miswired thermostats, and new thermostat installs.
- Ductwork Repair & Installation: Leaky, damaged, disconnected or undersized ducts, and new duct installation. Not duct cleaning.
Questions
Why is my furnace blowing cold air?
Common causes include a dirty flame sensor, a failed igniter, a clogged filter that trips the high-limit switch, or the thermostat fan set to "on" instead of "auto". A technician can test each part.
Is it safe to keep resetting the furnace?
Repeated resets can mask a safety problem. If the furnace keeps locking out, leave it off and have it checked.
What should I do if I smell gas near the furnace?
Do not operate switches or the furnace. Leave the home, then call the gas utility emergency line or 911 from outside.
Talk to a local HVAC contractor
Calls about furnace repair are connected to an independent HVAC contractor, subject to availability. HVAC Nation may receive compensation when your call is connected with a participating provider. Providers are independent businesses.
Furnace Repair by location
Calls are connected to independent HVAC contractors in 207 listed cities across 38 states.
Example cities: Jacksonville, AR, Camarillo, CA, Pacific Grove, CA, Torrance, CA, Margate, FL, Ottumwa, IA, Hutchinson, KS, Sanford, ME, Morristown, NJ, Lima, OH, Mount Vernon, OH, East Providence, RI, Bristol, VA, Martinsburg, WV.
States: Alabama, Arizona, Arkansas, California, Colorado, Delaware, Florida, Georgia, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, New Hampshire, New Jersey, New York, North Carolina, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, Tennessee, Texas, Utah, Virginia, Washington, West Virginia, Wisconsin, Wyoming