changing heater core help!
Senior User
Joined: Sep 2004
Posts: 265
Likes: 1
From: Canada
no heat...
Well man, a couple things. I just had a lack of hot air myself, it would blow warm, but couldnt keep up at all and warm me up. First things first, make sure the flapper for the hot/cold is working. Middle of the dash at the bottom theres the cable, right there in the open, make sure its going all the way to its position. Also, the heater hose is hot going INTO the core, how about coming out, thats more important. Mine was hot going in, and not as hot coming out . I was gonna dish out for a new one, but decided to try flushing it out with the garden hose, and low and behold...it worked. i just went back and forth between the two fittings, and watched the rust, and other crap come out, cheapest fix ive done in a while! Good luck, winters cold...
Brian
Brian
Postmaster
Joined: Apr 2000
Posts: 2,838
Likes: 6
From: SD
Originally Posted by cobden
Where is this control valve?
Marty
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Elder User
Joined: Sep 2003
Posts: 785
Likes: 1
From: colorado
this is a really simple thing to check. but i had this same problem when i first got my truck. make sure the cable that goes to the air box or whatever it's called is moving the lever all the way over so your not letting in outside air. all i could ever get was kind of warmish heat. then i was messing around one day and noticed that . wow what a difference!
opps just saw this was already mentioned. sorry.
opps just saw this was already mentioned. sorry.
Last edited by bassdude; Oct 23, 2004 at 10:57 PM.
Junior User
Joined: Oct 2004
Posts: 65
Likes: 0
From: new brunswick
hi i just removed a heater box from a 78 f350 2wd and it only takes about a half an hour to do.first get a catch pan for the coolant ,then unhook the heater hoses and electrical from the blower motor and 3 nuts holding the heater box to the firewall.thats all you need to remove under the hood then open the pass side door unhook the two cables that work the heater doors, remve the screws that fastened the vent door on the heater box.after that a quick look to make sure everything is unhooked and it should pull out through the bottom.now the heater box can be taken to the bench for heater core removal,also a good time to replace the blower motor if its getting noisey. the heater core only sells for $35-$50 and dont forget to flush the complete cooling system and put fresh antifreeze and maybe a thermostat. i hope this helps
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