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Message: <blockquote data-quote="thereal_sp94GT" data-source="post: 1541614" data-attributes="member: 31022">Hi all. First timer. Thanks for reading!I have a 94 Mustang GT Convertible (5.0, 5spd). Recently, I noticed when on HI heat/ac, the hot/cold temperature knob would have a lot of resistance. This would result in the knob actually turning itself from the "tension" or "suction." Not sure what is happening or how to fix it.When I lowered the air flow, it did not have this issue and the knob felt perfectly normal and stayed in place. It is only when I put heat/ac on the middle or HI setting does the hot/cold temperature knob feel resistance.I checked all the lines going into the firewall, removed the radio and bezel for a better look. Checked the lines behind the glove box. It seems like all tubes are snug and in good condition. I do not see any kinks in the two black cables leading into the white temperature control module.I purchased a used 94-00 Mustang HVAC Control Head W/ Cables Climate AC Heat Control (Aa7117) on eBay, but not sure if replacing this would solve my issue. But, for $23 bucks, I took the risk.Also, while I noticed this knob issue, my heat/ac was only blowing out of the front defroster. A common issue in SN95 I am reading. This issue seems to have disappeared as it now switches from vent, to floor, to defroster with no issues.Can these two issues be related. What is happening?Is it the hot/cold temperature knob cables or the small white temperature control module itself? That would be my suspicion, since those two cables are hooked up directly behind the hot/cold temperature knob.Do I need to take apart the whole dash for something like this?*** I am also looking to see if anyone knows what I need to remove the two screws in the white temperature control module.Thank you for your help in advance!!!</blockquote>