| Author |
Message |
warlock
Guest
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 Posted:
Mon Nov 21, 2005 3:18 am Post subject:
Heater still doesn't work |
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I asked for help a few months ago concerning no heat on my 1978 Ford
Granada. I did replace the thermostat but still had no heat. I then
connected my compressor to the hose to the heater core and blew it out.
There is no blockage or leaks. Air came out of the return hose freely. I
am going to dismantle the dash to get to the head and cables next. What I
want to know is: 1. Is water always circulating through the heater core?
If not, what allows the water to circulate? Turning the temperature adjust
lever in conjunction with the selector lever? 2. Can the problem just be
the core itself? Both hoses into and out of the core are hot and the air
circulation does change when I move the selector lever to vent, ac,
high/low, heat, and defrost.
Thank you
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trainfan1
Guest
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| Posted:
Mon Nov 21, 2005 4:22 am Post subject:
Re: Heater still doesn't work |
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warlock wrote:
| Quote: | I asked for help a few months ago concerning no heat on my 1978 Ford
Granada. I did replace the thermostat but still had no heat. I then
connected my compressor to the hose to the heater core and blew it out.
There is no blockage or leaks. Air came out of the return hose freely. I
am going to dismantle the dash to get to the head and cables next. What I
want to know is: 1. Is water always circulating through the heater core?
|
Yes.
| Quote: | If not, what allows the water to circulate? Turning the temperature adjust
lever in conjunction with the selector lever? 2. Can the problem just be
the core itself?
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Doesn't sound like the problem.
Both hoses into and out of the core are hot
Good.
and the air
| Quote: | circulation does change when I move the selector lever to vent, ac,
high/low, heat, and defrost.
|
The problem is your temp lever/cable/control - this is the blend door
control. Follow the cable from the temp control lever and watch or feel
the action at the blend door bellcrank... it's probably not moving. If
it is, you will have to take the heater box out, as the shaft has broken
off the door/flap.
Rob |
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Guest
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| Posted:
Mon Nov 21, 2005 6:46 am Post subject:
Re: Heater still doesn't work |
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On Sun, 20 Nov 2005 13:18:08 -0800, "warlock" <warlock@ispwest.com>
wrote:
| Quote: | I asked for help a few months ago concerning no heat on my 1978 Ford
Granada. I did replace the thermostat but still had no heat. I then
connected my compressor to the hose to the heater core and blew it out.
There is no blockage or leaks. Air came out of the return hose freely. I
am going to dismantle the dash to get to the head and cables next. What I
want to know is: 1. Is water always circulating through the heater core?
If not, what allows the water to circulate? Turning the temperature adjust
lever in conjunction with the selector lever? 2. Can the problem just be
the core itself? Both hoses into and out of the core are hot and the air
circulation does change when I move the selector lever to vent, ac,
high/low, heat, and defrost.
Thank you
|
If both heater hoses are hot, you got coolant in the heater core. You
probably got an air leak, or possibly a clog in the heater ducts.
Mice can plug a duct.
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Fluke
Guest
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| Posted:
Sat Dec 10, 2005 6:06 pm Post subject:
Re: Heater still doesn't work |
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"warlock" <warlock@ispwest.com> wrote in message
news:dlqpa90tli@enews3.newsguy.com...
| Quote: | I asked for help a few months ago concerning no heat on my 1978 Ford
Granada. I did replace the thermostat but still had no heat. I then
connected my compressor to the hose to the heater core and blew it out.
There is no blockage or leaks. Air came out of the return hose freely. I
am going to dismantle the dash to get to the head and cables next. What I
want to know is: 1. Is water always circulating through the heater core?
If not, what allows the water to circulate? Turning the temperature
adjust
lever in conjunction with the selector lever? 2. Can the problem just be
the core itself? Both hoses into and out of the core are hot and the air
circulation does change when I move the selector lever to vent, ac,
high/low, heat, and defrost.
Thank you
|
Just wondering what you mean by core? Water always circulates through the
inner radiator - but saying that there is a valve (heater hot /cold) that
allows hot water to flow. Check the valve is working properly....
I had the same problem with a cortina some years back.
check:-
1...Make sure you check the thermostat for correct operation (fit a 92%
stat)
2...As above check the heater control valve is working correctly
3...Check internal radiator for leaks blockage (not sure where it is a on a
granny - but on the cortina it was under the bonnet near the bulkhead)
4...The water pumps are normally OK but check this also (though if the pump
was knackered the car would overheat)
5...Also remember to check the air ducts for blockage
6...Also check the fan - maybe it is running all the time (electric) - if it
is a viscous fan make sure it is free to turn.
Fluke |
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87aerostar
Guest
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| Posted:
Sun Dec 11, 2005 8:59 pm Post subject:
Re: Heater still doesn't work |
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As posted below, sounds like the post on the mixture door in the heater
air plenum. I had one break off on my Aerostar. Let us know if that
is what it proves to be. Since I replaced mine, I've been parking the
car with the door in the defrost position, while it is still warm. I
believe mine broke when adjustments were attempted while the car was
cold in freezing temperatures and the plastic was brittle. This seems
to be a common problem. Can anyone else attest to this part breaking
in unwarmed-up cars in freezing temperatures? |
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