ok here is what I have. Turn on heater fan runs no ignition, no smell of gas. After 3 cycles flashing service code AGC. My Gas supply is ok. My pool is functioning properly. I don't have 24v at the gas valve when heater is turned on. I have no 24v at the purple wire of the ignition control terminal which powers the ignition cycle. I can't be sure it is the controller because the gas valve has to satisfy the controller to turn on the ignition cycle. Anyone have a problem similar to this?