Why does my forced hot air furnace not heat above 60 degrees?

Discussion in 'HVAC Heating & Cooling' started by nicola, Feb 11, 2012.

  1. nicola

    nicola New Member

    Feb 11, 2012
    Why does my forced hot air furnace not heat above 60 degrees?
  2. Tom Sawyer

    Tom Sawyer In the Trades

    Nov 29, 2010
    Could be a whole bunch of reasons.

    Undersized furnace for the load or furnace not fired at high enough rate to keep up with the loss
    Plugged filter
    Blower not running or not running fast enough
    High limit set too low
    Undersized duct or broken duct work
    Insufficient return air
    Bad or mis-adjusted thremostat
  3. Sponsor

    Sponsor Paid Advertisement

  4. jimbo

    jimbo Plumber

    Aug 31, 2004
    San Diego, CA
    Are you gas or a heat pump? If heat pump, check the circuit breaker on the backup electric heaters.

    What has changed recently? Did the heat use to work and now it doesn't? Anything new like a thermostat, air handler or furnace parts???
Similar Threads: does forced
Forum Title Date
HVAC Heating & Cooling Aprilaire dehumidifier 500A not working but test does Dec 8, 2016
HVAC Heating & Cooling Blower won't come on on "auto" but does with "on" Oct 29, 2016
HVAC Heating & Cooling Replaced heat pump cap. does it need to charge? Aug 12, 2016
HVAC Heating & Cooling Does running two trunklines address the problem of trunkline duct being too small Nov 19, 2015
HVAC Heating & Cooling Gas Furnace Blower motor does not always cycle Oct 22, 2015

Share This Page