Just had my blower motor replaced and now two days later the blower won't shut off. After testing, it appears that the contactors need replaced along with the transformer. I am fairly handy but somewhat of a novice at HVAC reapir. My question is two-fold:
1. Could the new blower motor (or work related to it) have had any impact on the sudden issue with the contactors and burnt out transformer?
2. The transformer is no problem, but how difficult is it to change the contactors? I have never changed it before.