More Temp Problems!!!
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Junior User
Joined: Nov 2004
Posts: 58
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From: Cherokee, AL
More Temp Problems!!!
This is driving me crazy! 96 4.0L 5-spd 4x4
Ok I have the broken blend door. SO I have a shutoff valve in the heater hose to stop hot water from getting to the Heater Core so I can use the A/C. I had a fear that an air bubble might get in the line when I used the shutoff valve...but I was assured that would not happen.
Well, now that I have the line shut off, the temp hand constantly eases up to HOT, then immediately and FASTLY drops to Cold.....back and forth, back and forth....
I can open the valve back up and the temp hand begins to stabilize back out....WHAT NOW???
Ok I have the broken blend door. SO I have a shutoff valve in the heater hose to stop hot water from getting to the Heater Core so I can use the A/C. I had a fear that an air bubble might get in the line when I used the shutoff valve...but I was assured that would not happen.
Well, now that I have the line shut off, the temp hand constantly eases up to HOT, then immediately and FASTLY drops to Cold.....back and forth, back and forth....
I can open the valve back up and the temp hand begins to stabilize back out....WHAT NOW???
Posting Guru
Joined: Jun 2003
Posts: 1,777
Likes: 1
From: Perry,Ga.
You need to put a by-pass valve in line.the water needs to cirulate like its running through the heater core.Or you can just dicconect the heater hoses and use a a pice if pipe to splice them together,
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Junior User
Joined: Nov 2004
Posts: 58
Likes: 0
From: Cherokee, AL
Originally Posted by GrayRanger4x4
You need to put a by-pass valve in line.the water needs to cirulate like its running through the heater core.Or you can just dicconect the heater hoses and use a a pice if pipe to splice them together,
Post Fiend
Joined: Feb 2003
Posts: 6,940
Likes: 2
From: Eastern WA
Why not just fix the blend door instead? In the sticky at the top of this forum called technical information, you will find instructions.
Here is the URL: https://www.ford-trucks.com/forums/s...threadid=24962
Folks sometimes overlook that sticky; lots of good info in there.
Here is the URL: https://www.ford-trucks.com/forums/s...threadid=24962
Folks sometimes overlook that sticky; lots of good info in there.
Thread Starter
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Junior User
Joined: Nov 2004
Posts: 58
Likes: 0
From: Cherokee, AL
Originally Posted by CowboyBilly9Mile
Why not just fix the blend door instead? In the sticky at the top of this forum called technical information, you will find instructions.
Here is the URL: https://www.ford-trucks.com/forums/s...threadid=24962
Folks sometimes overlook that sticky; lots of good info in there.
Here is the URL: https://www.ford-trucks.com/forums/s...threadid=24962
Folks sometimes overlook that sticky; lots of good info in there.
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