X2 on the mud daubers, cost me around $500 for repairs on the water heater due to them. I had screens on all the lovers but one, it was the smaller louver on the left side of the access panel. New circuit board, gas relay, wiring and labor. I had the local mobile RV service do the work, and was very pleased with them. (Cost wasn't very nice but all is working)
I went to my local RV parts store looking for a screen to cover that one louver and low and behold, there it was the correct screen to cover it. You have to drill a 1/16th hole in one of the louvers to fasten the spring. when I took it to the counter to pay for it, the lady said they just got them in, and they were the first ones they had seen for that louver. I'll have to find the package info to remember you makes it.
