umm where did the heat go

[madsho]

so... i was chillin in my car at my local gas station.. waiting for it to heat up... got the defroster on high... all is working well... all of a sudden all of the interior lights start dimming.... im all like wtf.. and then..... no heat... no nothing.. car starts running normal.. but no functon from the climate control thingy...... any help would be great.... oh and did i mention it was like 30 below and i just took it through the car wash... now that i think about it.. thaT WASNT THE BEST IDEA... and one more problem... my heat only has one setting.. high.... what causes this

 

[EMB2580]

so... i was chillin in my car at my local gas station.. waiting for it to heat up... got the defroster on high... all is working well... all of a sudden all of the interior lights start dimming.... im all like wtf.. and then..... no heat... no nothing.. car starts running normal.. but no functon from the climate control thingy...... any help would be great.... oh and did i mention it was like 30 below and i just took it through the car wash... now that i think about it.. thaT WASNT THE BEST IDEA... and one more problem... my heat only has one setting.. high.... what causes this

Sounds to me like your alternator took a crap or you battery is no good. A bad alternator usually makes the EATC do wacky things. For your second problem, sounds to me like your blower control module has crapped out as well. When they do, the blower fan will go to full blast. Of course, I could be wrong, in that the case, I'm sure someone will chime in to correct me

 

[NiNeTy Fo SHO]

If you set the climate control to off, and it blows on high out of the defrost, the BCM (blower control module) needs replaced. You can get one pretty much out of any ford vehicle (within the same years as your car) with a climate control. I replaced mine with one from a lincoln...been 3+ years with no problems.

 

[madsho]

ok so i took some time today to check it out further and i found that the 30 amp fuse blew.... so i replaced it and soon as i turned on the heat it blew again... what does this mean?

 

[madsho]

blower control module? =blower motor

 

[madsho]

If you set the climate control to off, and it blows on high out of the defrost, the BCM (blower control module) needs replaced. You can get one pretty much out of any ford vehicle (within the same years as your car) with a climate control. I replaced mine with one from a lincoln...been 3+ years with no problems.

i dont think your getting me.. there is no blowing.... nothing... i turn it on and nothing.... the fuse blows and thats all she wrote.... and when it did funtion it only worked when put on high... any other spped was equal to off

 

[SHOZ123]

Only high speed means the blower speed control is bad. Shorting out now it seems.

 

[madsho]

Only high speed means the blower speed control is bad. Shorting out now it seems.

blower speed control....? same as blower control module....... and could it be the actual blower motor.... there was a nother post where dudes blower motor froze from to much moister... an would this cause me to blow fuses

 

[jimtash]

A vaccum leak to the climate unit will also make the air blow just out of the defroster. I found this out when I accidentally cut the small line leading into the firewall.

 

[madsho]

ok so i took out the blower motor and the bcm.... both where completly covered in ice and the housing had about an inch of ice on the bottom preventing the blend door from opening.. i have the parts defrosting right now... is the a way to test and see which of these parts need replacing

 

[madsho]

anyone tell me where to get a NEW bcm.... everywhere i go they have them but it looks nothing like mine... wtf...... and is there a way to test the old components to see if they are functional

 

[TimboSHO]

Put them back in the car and see if they work. The fuse was probably just blowing because it couldn't physically move the blower motor because it was caked in ice. I say defrost and put it all back together.

 

[madsho]

**** yeah... let all the components dry and put them back in and...... heat.....oh so lovely heat...... the lesson of the week is..... dont take your car through the car wash when it is -30 degrees...... would still like some help finding a new blower control unit... i still only have high and off functions