Delay in heater firing is causing concern
I installed a wall type gas heater approx 2 years ago. The first year all worked fine. Year 2 we started having issues where the heater would not come on as it should and after some basic trouble shooting we found that we were having thermostat problems. I was working fine until about a month ago when you could hear it kick on but it takes a few seconds and then there is a mini explosion as if the gas valve is sticking or something of the sort. At first it did not happen every time it lit now it does. Any thoughts?