Hi ya'll! Newbie here. First time owning a home and have no idea how to fix our Heatilator, Model is ND3630I. Normally we would just call our landlord but unfortunately that's not the case here. We have 2 switches on the wall, the fireplace will not light unless both is turned on. We can turn one off once the fire starts burning and the fire will continue burning. I'm assuming one of it is for the pilot? It's an IPI. We have always left one switch on once the fire starts going and just recently, the fire will go out randomly unless we leave both switches on. If we leave both switches on for 30 minutes, I can shut one switch off and the fire will go for about 30 minutes and then shut off. We had an HVAC guy come out and he said the pilot assembly and control module is bad so he switched it out. He then said to leave both switches on because for some reason, it's sending mixed signals to one another and having just one switch on is probably "frying" it. Kind of pissed because technically he really didn't fix it. The fire did stay on longer with just one switch on but it eventually goes out. We left both switches on the next day for a few hours and then the following night, it doesn't even turn on at all. What could be the issue here? I don't want to pay for someone to come out again.