The first winter in our new house, I discovered that the furnace wasn't working. Traced it to the gas valve, replaced it with a White Rogers 36H33-412 and the furnace worked great through the winter. Now one year later, I turned on the furnace for the first time this winter and found that the gas valve is again not working. What could cause a relatively new (<1 year old) valve to stop working over the course of ~8 months with no use? Gas and voltage go to the valve just fine, ignitor fires up, but no gas comes out from the valve to catch. Seems like it is stuck, but banging with a wrench didn't cause anything to become unstuck! Again, everything worked fine for a full winter after the new valve was installed. Any ideas would be greatly appreciated! I'm in a warm and dry climate. Trane system is probably ~10 years old. Small house.

I have a beckett oil furnace and recently added a new above ground tank and installed a tiger loop ultra with 10 micron spin on filter. The problem is the 10 micron tall filter is too big and the oil pump on the furnace can't pull enough oil through it. I had to fill the filter with oil to the brim first and then install the filter. The furnace would run until the oil in the filter goes down to half and then lockout would occur. I pulled the filter and it was 3/4 full. I am getting plenty of oil into the tiger loop I can see it coming in, but it's not fast enough to fill the filter and then go to the pump without causing a lockout to occur. Should I get a shorter smaller spin on filter or get another tiger loop with no filter and attach a separate filter. No oil leaks was found in the system. I had an oil tech checked it and said it's the filter.