It cost me to replace the blower ,the heat resistor and the ac face plate before finding the problem is with the tipm.

Then replaced the tipm with a rebuilt one that failed in the middle of the highway at 60 miles per hour. Luckily no accident.

Then a second tipm trial that was supposed to be tested would not start the van.

I still have the same problem after putting back my old unit and lost trust in any rebuilt parts.