Heater control
11-21-2013, 12:15 AM
#1
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Year: 1989
Model: Cherokee
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Heater control
Hey guys, hoping to gather some information before i dive into this. My heater control works, but doesn't change air flow direction between vent, defrost and the 3rd option. Blows hot, but fan feels like it could be replaced. Is this a simple cable drive to take a look at or???
11-21-2013, 07:09 AM
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Year: 1990
Model: Cherokee (XJ)
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Check out these vacuum lines.
11-21-2013, 09:51 AM
#4
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One of those Mity Vac hand pumps is one of the best diagnostic tools you could ever waste money on. Besides finding a leak, you can check operation of each actuator and the selector valve.
11-21-2013, 10:27 AM
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11-21-2013, 05:42 PM
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11-21-2013, 06:10 PM
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Here's one of my famous photos that appeared on the cover of JP Magazine.
Testing the HVAC/Cruise Control vacuum system with a Harbor Freight hand vacuum pump.
Testing the HVAC/Cruise Control vacuum system with a Harbor Freight hand vacuum pump.
11-22-2013, 05:33 AM
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About $30 IIRC. You don't HAVE to have one to diagnose your system. Simply put your finger over a disconnected hose in your system and see if vacuum is present by sticking you finger over the end. Start at teh fitting closest to the firewall.
11-22-2013, 07:24 AM
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04-07-2015, 03:51 PM
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04-07-2015, 06:33 PM
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Here's a whole bunch of vacuum pics.
Open the link, click the image to make it larger, then click it again for larger yet.
https://www.cherokeeforum.com/g/album/3212409
Cruiser and I steal pics from one another. LOL
Open the link, click the image to make it larger, then click it again for larger yet.
https://www.cherokeeforum.com/g/album/3212409
Cruiser and I steal pics from one another. LOL
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