Hello I am new to this forum. I have been having a problem with my pool heater. The blower motor was staying on all the time even when the heater was shut off. The heater would not fire as it was throwing a code saying air flow problem. There was some debris down in exhaust tube from mice. That was cleaned out and I attempted to fire the heater. It started, but it only ran for a few minutes and the motor slowed down. I called Sta-Rite and they said the control module was bad. I replaced the control module and the blower motor started to spin again with out turning the heater on. I pushed the on button and the blower motor sped up and the heater fired. It stayed on for about five minutes and started to make a very loud bassy noise and started to smoke through the exhaust fluke. It appears to be having the same problem prior to changing the ignition module. Has anybody experienced this problem? Thank you for your time.