We get a pf code and then intermittent it will give a number indicating how ling the cycle will run for…but does not start…we have changed the circuit box since we were unsure if this was the same problem to our water heater, which fixed the water problem…we held in start button for 5 seconds and no change…we also have changed the thermister with no luck in getting it to run…no blockages in vent either…please help, cannot afford a tech to come out!!!