I cleaned one of my two washable furnace filters last night. Normally, I dunk it in a laundry tub of soapy water and then do it again with clean water. This time, it came apart partially while cleaning, so I figured I'd just take it all apart and wash the actual filter piece by machine. That part worked out great, and the filter now looks like new. It went back together without much trouble, too.
The problem is, I forget which way the filter went in originally. There is an arrow on the filter frame itself, but since I
removed the filter and put it back in, there's a 50/50 shot that it's pointing the wrong way.
I thought I'd just look at the other filter, but alas it's different and the filter is the same colour on both sides. This one has a pale green colour on one side and a light grey on the other. Anyone have a filter like this and know what way air flows through?
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Unfortunately, the furnace stopped working today so I guess it doesn't matter :P
That happened with an old furnace in a house i lived in, it seemed to conk out until we replaced the filter and then it fired back up. Older furnace too, didn't see how it was tripping a sensor, or if it was coincedental.