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How to check heater blend door

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Old 01-27-2014, 11:27 AM
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Default How to check heater blend door

Hello all,

How do I check the heater blend door on a 96? I get warm air out of my vents but not hot. I've changed the coolant and put a new thermostat in (Mopar 195). I did not do a flush. Operating temp is normal. I'd prefer to start with the simplest thing before jumping to heater core problems.

I did a search and found a few threads similar to what I'm asking. A lot of replies say this has been covered before but I can't find any old threads on it.

Thanks guys
Old 01-27-2014, 11:35 AM
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If you want to start with the simplest thing first as you say. Start by back flushing the heater core since that is the most common reason for no heat !!
Old 01-27-2014, 11:45 AM
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^yep^...x2 with Rob here (off the pills by now?
Old 01-27-2014, 01:42 PM
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Originally Posted by Roler
^yep^...x2 with Rob here (off the pills by now?
LOL OFF and On. Today is a good day. Or should I say a better one. LOL!
Old 01-27-2014, 03:22 PM
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Originally Posted by loligator
Hello all,

How do I check the heater blend door on a 96? I get warm air out of my vents but not hot. I've changed the coolant and put a new thermostat in (Mopar 195). I did not do a flush. Operating temp is normal. I'd prefer to start with the simplest thing before jumping to heater core problems.

I did a search and found a few threads similar to what I'm asking. A lot of replies say this has been covered before but I can't find any old threads on it.

Thanks guys
It's a cable with a clip on it kinda up behind where my pointer is in the pic.
Attached Thumbnails How to check heater blend door-tcu-fuse.jpg  
Old 01-28-2014, 08:45 AM
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Originally Posted by cruiser54
It's a cable with a clip on it kinda up behind where my pointer is in the pic.
thank you for actually addressing my question not as though the other advice isn't helpful. so as long as that moves completely from one side to the other when the temp slider is moved it should be working as expected, correct?

i've been trying to address this heat problem for a bit longer than i'd like. thought i fixed it by swapping in an OEM t-stat which helped for sure but on these 8 degree days we've been getting it doesn't blow as warm as it should. i'm comparing it to my 95 xj which blows ridiculously hot.
Old 01-28-2014, 02:15 PM
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Originally Posted by loligator
thank you for actually addressing my question not as though the other advice isn't helpful. so as long as that moves completely from one side to the other when the temp slider is moved it should be working as expected, correct?

i've been trying to address this heat problem for a bit longer than i'd like. thought i fixed it by swapping in an OEM t-stat which helped for sure but on these 8 degree days we've been getting it doesn't blow as warm as it should. i'm comparing it to my 95 xj which blows ridiculously hot.
Correct. Heater core is probably dirty then.
Old 01-28-2014, 02:24 PM
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Originally Posted by RTorrez1
If you want to start with the simplest thing first as you say. Start by back flushing the heater core since that is the most common reason for no heat !!
Originally Posted by Roler
^yep^...x2 with Rob here (off the pills by now?
Originally Posted by cruiser54
Correct. Heater core is probably dirty then.
And thats 3.
So, give that heater core a good reverse flush and " get the thing heating, baby" !!
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