I have an older gas furnace with electric ignition. The pilot light wouldn't light. It will try for couple minutes then turn off, but will never light. My first feeling was that it was the gas valve. I bought a brand new valve and installed it. It worked once to fire up and then stopped. It seems like I am not getting gas out of the pilot valve. My question is what power is supplied to the gas valve to let it know to open up the pilot light valve. There is only two wires running to the gas valve.

To me, replacing furnace filters was easy: remove the old and put the equivalent in. When I bought my house in 2014, the furnace filter was 20X25X1 and I've been replacing it with the same size ever since although it seemed unusually difficult to get in. See the photo. Yesterday I noticed a old oil company sticker on my furnace that said the filter they installed was 24X24. I've used this filter in the past and know 24X24X1 is hard to find so my predecessor may have used a different size. I'm going to change to a 24" filter but am wondering about total size and exact placement, so here's my questions: 1. The actual opening to the furnace (air flows right to left) is approx 15" in height. So, the filter now covers a lot of sheet metal. Can I use a 20X24 or even 16X24? 2. The place to install the filter (see photo, please) is approx 4" and I've placed the filter against the furnace opening. However, you can see the filter takes up only a small portion. As you can hopefully see in the photo, that location is split with a little over an inch on the right side and the balance to the left. It seems to me the 1" filter should go on the right side (where I've placed an arrow) but that leaves a space between the furnace opening and the filter. That space has a cover, but not tight. Where does the filter go: far left where it is now, or far right? [ATTACH]61851[/ATTACH] I take it I need to seal the area if I put the filter to the right. Thanks in advance.