HVAC no air center of dash June 11, 2018, 09:54:10 PM 1987 Thunderbird 3.8 I get air through the defrost and on the floor but nothing else. I replaced heater core last fall and do not recall taking any duct work apart, the fan only blows on high I have been told that a thermo reactor or something like that is bad. Quote Selected
HVAC no air center of dash Reply #1 – June 12, 2018, 02:39:53 AM Quote from: walkingbird;4660661987 Thunderbird 3.8 I get air through the defrost and on the floor but nothing else. See HVAC vacuum diagram. Quotethe fan only blows on high I have been told that a thermo reactor or something like that is bad.The thermal limiter on the blower resisters has blown. Rockauto has them.https://www.rockauto.com/en/catalog/ford,1987,thunderbird,3.8l+232cid+v6,1140220,heat+&+air+conditioning,blower+motor+control+module+/+resistor,6557 Quote Selected
HVAC no air center of dash Reply #2 – June 12, 2018, 09:01:48 AM its just a fuse,, that blew but this special fuse is made onto the blower speed controll thingy inside your duct behind the glove box.it can be jumped with a really super thin wire half the diameter of telephone type wire or something small you have lying around.your just trying to recreate a fuse link again but doing so with the idea that the wire you pick will in fact blow....clean the squirril cage / fan blade out,, its probably heavy crud build up and making the motor work hard.lubricate the shaft again,, if i recall, there is one of those "oil here" ports on either end. Quote Selected