Leo Monahan· Registered
Several weeks ago the A/C blower began operating intermittently. First symptom was occasionally it would not run. Next was when running, the speed control was unstable. Finally it failed totally. The fan relay and all other controls were operating normally. The Variable Blower Control (VBC) was not heating. I replaced the VBC and the blower began working normally. 2 days later it reverted back to the same symptoms. Another new VBC and it was working again. 2 days later the same thing. No heat from the VBC. I replaced the in-dash controller twice and the same thing, works for a short time and then stops. I removed the Glove Box, VBC and Blower motor from the dash and ducting. I tied the blower to the lower Glove Box brace and started trouble shooting in earnest. The blower motor was the issue. I replaced it and all is fine now. I pulled the motor from the plastic housing and found the motor had a significant amount of rust on the outside casing. When I removed the blower motor initially I found a handful of leaves in the squirrel cage. My best guess is that at some point of time leaves had clogged the condensate drain backing water up into the motor. I have had this truck since new and have never replaced the in cabin micro filter nor cleaned the condensate drain tube. Today I will rectify that. I will post any further findings as I progress.