Hi guys I need help to fix my ECM blower motor module. It third time I am replacing motor on my water heater tank that works on natural gas. Each time the motor cost me 1850$ plus the labour to replace it.
The motor runs on 120v and speed regulated by contrôler by giving 36v duty cycle. The problem with the motor module is that it is stuck on high speed which is 100% duty cycle. I am sure it is one of the components on the module is defective that can replace to fix the problem. I don’t know how to upload the pictures.
Here is module picture front and back 
