No warm heat!!!
10-16-03 | 07:36 AM
#1
Thread Starter
Junior Member
Joined: Aug 2003
Posts: 33
Likes: 0
From: no where
No warm heat!!!
I have no heat. When I slide the the bar from cold to hot i don't hear anything and nothing happens. It continues to blow cold air. It's almost winter soon and i need to fix this!
i've heard it could be the logicon. Is there a write up on how to fix this? is it the heater/ac control unit that's above the cd deck?
what else can it be?
thx
i've heard it could be the logicon. Is there a write up on how to fix this? is it the heater/ac control unit that's above the cd deck?
what else can it be?
thx
10-16-03 | 08:30 AM
#2
Former Moderator. RIP Icemark.
Joined: Apr 2001
Posts: 25,896
Likes: 20
From: Rohnert Park CA
Did you search??? I think not as I have covered how to test the Logicon and air mix motor at least a dozen times. The search function is found in the upper right hand corner of this page.
To test the air/mix motor (which the Logicon controls for heat or cold).
If the air/mix motor is good, then chances are the Logicon is bad (as you say you don't hear anything moving, when you slide the control). I have rebuilt ones available on my website, PM me if you need the address.
To test the air/mix motor (which the Logicon controls for heat or cold).
So, there are three plugs at the Logicon. Two that plug directly into the back, and the third plug that runs off into the dash and plugs in above the air mix motor in the dash.
We are going to test a couple wires at that third harness.
So unplug that third harness. You now have a car side and a Logicon side. We are going to be testing on the car side of the plug, not the Logicon side.
We need to find the Green w/White stripe wire and the solid Yellow wire in that plug.
Putting your multi-meter on the wires, check for resistance (ohm). Resistance should be between 17 and 21 ohms at 70 degrees F.
If that checks out fine, then jumper 12 volts onto the Yellow wire, and ground onto the Green/white. The motor should move all the way over to the hot position.
If you reverse the two, (12volts on the Grn/wht and ground on the yellow) the motor should move all the way over to the cold position.
You only want to put the 12Volts on the wire until the motor gets to the hot or cold side. Remove the 12 volts after its there.
We are going to test a couple wires at that third harness.
So unplug that third harness. You now have a car side and a Logicon side. We are going to be testing on the car side of the plug, not the Logicon side.
We need to find the Green w/White stripe wire and the solid Yellow wire in that plug.
Putting your multi-meter on the wires, check for resistance (ohm). Resistance should be between 17 and 21 ohms at 70 degrees F.
If that checks out fine, then jumper 12 volts onto the Yellow wire, and ground onto the Green/white. The motor should move all the way over to the hot position.
If you reverse the two, (12volts on the Grn/wht and ground on the yellow) the motor should move all the way over to the cold position.
You only want to put the 12Volts on the wire until the motor gets to the hot or cold side. Remove the 12 volts after its there.
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