Hi everyone, I am new to this forum but I have had a pool for many years. This year I converted to a swg and everything looks good. However after about a month I started getting gas message on heater. In the past that usually meant skimmer or filter was closed. This year I get gas error but no low pressure. The first time I got this was when I put heater on a timer. Sines then I am controlling the on and off by hand but I am still getting the gas error and no heat. What happens is when I turn on the blower runs at high for awhile like it supposed to then blower runs low for awhile then the heater comes on and I get heat for about 10 seconds then the process starts over again. I can eventually get it to work by turning the gas control knob off wait a few minutes then turn it back on. Sometime I have to do this several times. Once on it continues to run ok. I don't think it pressure this time but who knows. Any help would be appreciated.