Check coolant level
Replace thermostat
Check to see if heater core is plugged, restricted, or airbound
Check temperature control cable
ruud furnace only blows cold air, no heat
ihave a 1986 chevette that when i turn defrost on it blows out heat and when i put heater on it blows out only cold air? ihave a 1986 chevette that when i turn defrost on it blows out heat and when i put heater on it blows out only cold air?
The heater blend door is vacuum actuated. You have a vacuum leak somewhere.
You are likely in an antarctic region.
I have a 2000 Chrysler cirrus it only blows cold air on the heat cycle. can someone help me as to why this is happening?
Does the engine heat up fully?
Could be that the thermostat is stuck open, new thermostat fixed my 2001 Dodge 3500. If your temperature gauge is not reading warm enough, could be the thermostat.
I have changed heater core and did no good same problem as before it blows only cold air I do not understand it
The heater is blowing out cold air only
How do I replace the heating coil in a 2006 Grand Caravan? I have no heat it only blows cold air.
the heat blows out the defrost when it should blow out floor vents only
sounds like the cable from the knob is streached/broken or flap has stuck closed