Originally Posted by Phil57
I haven't had mine in recall yet. We have very low water pressure at our seasonal site this year. It plays hell with the WH.
Phil this may sound strange but after talking to Atwood after having the recall done every thing the manual tells you to do goes out the window. I was attempting to reduce the hot water temp by turning the modulation control clockwise toward min what that does is bypass more cold water directly to the burner. The reason our units did not light was we were bypassing the flow switch which is required to turn on the fan and the burner. Turning that same modulation control counterclockwise to max sends max water through flow switch allowing the use of more cold water to regulate less hot. I tried it with the Atwood person here and it worked perfectly. Also try changing the spray pattern on the shower head to a setting that produces more flow.
Even though you haven't had the recall try turning the modulation valve counterclockwise as far as it goes.