94 Caravan heater blows cold

On Sat, 27 Dec 2008 20:34:26 -0600, "NotMe" wrote:

>
>
>"Jim For" wrote in message
>
>: My 94 Caravan blows only cold air no matter what I set the temp for. I
>know
>: I am getting hot water thru the heater core. And, it only seems to blow
>out
>: the defroster and floor ports no matter what vents I have selected. I
>think
>: there's a problem with one or more of the vacuum powered dashpots inside
>the
>: air plenum. How can I get to these? They are all enclosed inside a self
>: contained A/C - heat box. Is this a common problem ??
>:
>:
>Are you getting enough hot water? If the core is restricted you will get
>hot water but not enough to heat the air.
>
And if the rad is low, water flow will be minimal.
 >> Stay informed about: 94 Caravan heater blows cold 

No, water is not the issue. I'm sure the door that allows air to cross the
heater core isn't opening. It's just recirculating cold air in and out. And
I always get air out of the defroster outlet, regardless of what I have
selected on the control panel
wrote in message

> On Sat, 27 Dec 2008 20:34:26 -0600, "NotMe" wrote:
>
>>
>>
>>"Jim For" wrote in message
>>
>>: My 94 Caravan blows only cold air no matter what I set the temp for. I
>>know
>>: I am getting hot water thru the heater core. And, it only seems to blow
>>out
>>: the defroster and floor ports no matter what vents I have selected. I
>>think
>>: there's a problem with one or more of the vacuum powered dashpots inside
>>the
>>: air plenum. How can I get to these? They are all enclosed inside a self
>>: contained A/C - heat box. Is this a common problem ??
>>:
>>:
>>Are you getting enough hot water? If the core is restricted you will get
>>hot water but not enough to heat the air.
>>
> And if the rad is low, water flow will be minimal.
 >> Stay informed about: 94 Caravan heater blows cold 

On Sun, 28 Dec 2008 10:33:51 -0500, "Jim For"
wrote:

>No, water is not the issue. I'm sure the door that allows air to cross the
>heater core isn't opening. It's just recirculating cold air in and out. And
>I always get air out of the defroster outlet, regardless of what I have
>selected on the control panel
> wrote in message
>
>> On Sat, 27 Dec 2008 20:34:26 -0600, "NotMe" wrote:
>>
>>>
>>>
>>>"Jim For" wrote in message
>>>
>>>: My 94 Caravan blows only cold air no matter what I set the temp for. I
>>>know
>>>: I am getting hot water thru the heater core. And, it only seems to blow
>>>out
>>>: the defroster and floor ports no matter what vents I have selected. I
>>>think
>>>: there's a problem with one or more of the vacuum powered dashpots inside
>>>the
>>>: air plenum. How can I get to these? They are all enclosed inside a self
>>>: contained A/C - heat box. Is this a common problem ??
>>>:
>>>:
>>>Are you getting enough hot water? If the core is restricted you will get
>>>hot water but not enough to heat the air.
>>>
>> And if the rad is low, water flow will be minimal.
>
Make sure you don't have a vacuum leak - like a split hose.
 >> Stay informed about: 94 Caravan heater blows cold 

On Dec 27 2008, 8:23 pm, "Jim For" wrote:
> My 94 Caravan blows only cold air no matter what I set the temp for. I know
> I am getting hot water thru the heater core. And, it only seems to blow out
> the defroster and floor ports no matter what vents I have selected. I think
> there's a problem with one or more of the vacuum powered dashpots inside the
> air plenum. How can I get to these? They are all enclosed inside a self
> contained A/C - heat box. Is this a common problem ??
>
> Cold Jim

the heater core is a common problem with the 1991 to 1994 caravans
flush the heater core with water in reverse
 >> Stay informed about: 94 Caravan heater blows cold 

Would this help a problem where it's not getting off a lot of heat except
when going over about 45mph? My 92 Caravan doesn't get all that warm these
days. When I'm going slow or sitting at a stoplight the heat coming out is
noticeably cooler.

Thanks,

Wesley



"truckdriver" wrote in message

On Dec 27 2008, 8:23 pm, "Jim For" wrote:

the heater core is a common problem with the 1991 to 1994 caravans
flush the heater core with water in reverse
 >> Stay informed about: 94 Caravan heater blows cold 

On Jan 18, 3:35 pm, "Wesley" wrote:
> Would this help a problem where it's not getting off a lot of heat except
> when going over about 45mph?  My 92 Caravan doesn't get all that warm these
> days.  When I'm going slow or sitting at a stoplight the heat coming out is
> noticeably cooler.
>
> Thanks,
>
> Wesley
>
> "truckdriver" wrote in message
>
>
> On Dec 27 2008, 8:23 pm, "Jim For" wrote:
>
> the heater core is a common problem with the 1991 to 1994 caravans
> flush the heater core with water in reverse

my 92 had the same problem i got a bottle of flush and ran it through
the entire system and flushed the heater core with water both ways and
it fixed the problem and the heat works good now try it it may work
for you to
 >> Stay informed about: 94 Caravan heater blows cold