Cabin Blower

[Stonetile]

Hey everyone, Fixing the cabin blower in a 99 873 F series with dual heater/blowers in the cab. I replaced both fan motors and the control knob/switch along with the resistors but still no fan... I changed out the motors because they were coated in dirt and clearly wouldnt work, resistors while I was in there and the control knob/switch because that was broken. I just finished installing them all and still have no fan, and yes the fuses are good. Could this be due to whatever module is connected right after the control switch? Does anyone know what that module actually does? Bobcat calls it a 'track' apparently and everyone at bobcat that I talk to doesnt know exactly what it is. Can I just skip the module in the wiring to see if that fixes it or will I blow a brand new motor if I try that? Thanks

 

[Stonetile]

Hey everyone, Does nobody on here have a similar heating system? Mine has a blower and heat exhanger on each side of you approx at your elbows with hot/cold and fan speeds above your left shoulder while in the bobcat. I have replaced the relay, speed control switch, fan motors and resistors now... I still have no fans. The heat exchangers work perfectly now, they just heat using the bobcat motor oil but no fan speeds work and I really don't want to pay bobcat their rate to find a broken wire or something now. Has anyone had any similar issues at all?

 

[Tazza]

Hey everyone, Does nobody on here have a similar heating system? Mine has a blower and heat exhanger on each side of you approx at your elbows with hot/cold and fan speeds above your left shoulder while in the bobcat. I have replaced the relay, speed control switch, fan motors and resistors now... I still have no fans. The heat exchangers work perfectly now, they just heat using the bobcat motor oil but no fan speeds work and I really don't want to pay bobcat their rate to find a broken wire or something now. Has anyone had any similar issues at all?

I was lucky enough for the problem with my AC blower to be a relay.
You have changed out just about everything...
You need to start by checking that you have power to the switch. If there is no power, trace it back. I bet its something so simple.