55 SHPEP CODES HELP

[petemal]

My father has a 55 shpep summers heat, I changed the codes a while back because I was running dirty pellets to 3-5-1, I am looking to bring it back to the factory setting 1*5*1 does anyone know what buttons I have to hit. is it the 2 up and down buttons together. I searched on here but code not find it

thanks in advance

 

[slvrblkk]

Yes, you must hit both up or down button simultaneously to get the numbers to change. BTW, factory is 1-4-1