I have one of the older Minimax NT 400 (I know its horrible) heaters. The fan was not coming on so I pulled it off and noticed the squirrel cage was rusted. I replaced the entire unit. Even after replacing the motor the fan does not kick on. The fan does feel warm to the touch. I called pentair and they had me jumper the ignition module but this did not work either.
Any thoughts on what else it might be?