heater blowing cool air - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars

rickylg78 · 10-23-2007, 19:43

just last week i turned on my heater for the first time this year and to my surprise it wasn't heat at all. it will blow heat for a few seconds then gets pretty much cold. i was told to change the thermostat, but that did nothing. i was also told that the heater control valve could be bad but found it doesn't have one. can anyone help me with getting this fixed. i have two little children so this is a necessity.

**jwko** · 10-23-2007, 22:01

could be the heater core stopped up or the blend door on the heat-box not working. If the temp gauge is normal (half way or so while heat is on) then that would rule out the thermostat. Try warming up the engine, heater on, temp on hot and raise the hood and feel of both heater hoses running through the firewall, both should be pretty hot and close to the same temp. If not then that would point to a stopped up heater core. If both are hot then I would look at the blend door.

rickylg78 · 10-25-2007, 06:50

ok i checked the heater hoses like you said and they are both hot. what about a sensor bad somewhere?

rickylg78 · 10-25-2007, 09:55

i checked the heater hoses and they are hot so i guess i will look into the blend door switch

**jwko** · 10-25-2007, 18:09

It's probably the blend door actuator.

joe · 10-27-2007, 13:55

where is the blend door and how does it work?

**tbird100636** · 10-27-2007, 13:57

Quote:

Originally Posted by joe

where is the blend door and how does it work?

What year, model, engine, Manual or ATC???

rickylg78 · 10-29-2007, 06:54

2002 3.0 manual controls. is it the blend door motor or the actuator?

**tbird100636** · 10-30-2007, 08:01

Quote:

Originally Posted by rickylg78

2002 3.0 manual controls. is it the blend door motor or the actuator?

It's an actuator, it's mounted on the side of the heater box, remove the ICP (Radio/Climate controls) and you will see it.

rickylg78 · 10-31-2007, 09:49

what should i expect cause i have been told that i will have to recharge my a/c unit with freon(r34). is this true and is there anything else i need to know that will help.