R9 its no a code o error/fail..
R9 its the old sta-rite board
Now sta-rite heater use R13
Wen you turn you heater on gonna light up
Showing 128 R9 o R13
U can find out whats wrong wit you heater soon it light service heater lights behind the board got lil lights
Afs> air flow switch
Hls> high limit
Ags> automatic gas shut off
If any or those lights its one thats the part u need to check or change!
Or open the electric box and the ignition module got a red light check how many times flash and find out...
I don't have a definite solution however r9 is a heater problem it could be a short curuit between the heater and ground make sure the ground wire has not become loose or corroded
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