Heater blend door
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Freshman User
Joined: Nov 2004
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From: Greenville, In.
Heater blend door
'94 Ranger with air. No heat out of the heater. The temp lever moves freely but I think it might be disconnected because I can't hear the blend door moving. I'm thinking the cable has come unhooked. The cable goes up under the dash pad so I obviously cannot see it. How do I get the pad off? Or, is there another likely problem?
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Joined: Feb 2003
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From: Eastern WA
Thoughts:
*Heater core blockage; are both hoses leading to the core warm and with one being much warmer than the other?
*Wrong temp thermostat or failed thermostat, usually evidenced by low temp gauge reading
*Trapped air in cooling system
*Heater core blockage; are both hoses leading to the core warm and with one being much warmer than the other?
*Wrong temp thermostat or failed thermostat, usually evidenced by low temp gauge reading
*Trapped air in cooling system
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Freshman User
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From: Greenville, In.
Originally Posted by CowboyBilly9Mile
Thoughts:
*Heater core blockage; are both hoses leading to the core warm and with one being much warmer than the other?
*Wrong temp thermostat or failed thermostat, usually evidenced by low temp gauge reading
*Trapped air in cooling system
*Heater core blockage; are both hoses leading to the core warm and with one being much warmer than the other?
*Wrong temp thermostat or failed thermostat, usually evidenced by low temp gauge reading
*Trapped air in cooling system
Okay on the heater hoses. Engine gets hot. I doubt it's trapped air in the system. Don't think both hoses would be hot if that's the case.
Since I posted, I see the archives are full of this "blend door" failure. The fix tells you to start working behind the glove box. My temp cable goes up over the top under the crash pad. Is this the same issue. If this blend door breaks, can you hear it when you cycle the temp lever? Feel it?
Post Fiend
Joined: Feb 2003
Posts: 6,940
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From: Eastern WA
Ford changed the heater setup in 95+ models and they now use a vacuum operated system. Thus you're exempt from the "common" blend door problem that seems to affect 95 - 99 Rangers/Explorers. I've never had the pad off on one of those (93 - 94), but I'd have to think that if you pull the glove box or the dash closure panel under it you could look in there and see if the cable is operating the blend door. Don't rule out the possibility of a failure of the cable to dash mounted control unit connection.
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Freshman User
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From: Greenville, In.
Originally Posted by CowboyBilly9Mile
Ford changed the heater setup in 95+ models and they now use a vacuum operated system. Thus you're exempt from the "common" blend door problem that seems to affect 95 - 99 Rangers/Explorers. I've never had the pad off on one of those (93 - 94), but I'd have to think that if you pull the glove box or the dash closure panel under it you could look in there and see if the cable is operating the blend door. Don't rule out the possibility of a failure of the cable to dash mounted control unit connection.
When I checked the both hoses for heat, it was after extended engine operation on the road. Both were hot. This time, I started the engine from cold and let the engine warm up. The inboard hose is hot, the outboard is cold/cool. I pulled the outboard hose off with the engine running. Just a very little bit of coolant comes out of the core nipple which tells me it's one of three things:
Low coolant level (OK)
Heater core blocked (don't think so but haven't blown through it. Truck has 19,000 miles on it)
Internal water valve in heater is blocking flow (I don't know if there is one).
When you move the warm/cold lever back and forth you can hear a door opening and closing. Well, you can hear it close, anyway. The warm/cold lever goes up over the top of the plenum under the crash pad.
Anymore ideas? Thanks.
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Freshman User
Joined: Nov 2004
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From: Greenville, In.
Heater core blocked (don't think so but haven't blown through it. Truck has 19,000 miles on it)That's what it was, heater core plugged. I've never had this happen before, even on old clunkers which I've had plenty of over the years let alone a low mile truck like this.
Thanks for the help.
Thanks for the help.
