How can I adjust the temp. on a norlake walk in cooler?

https://search.yahoo.com/yhs/search?hspart=Lkry&hsimp=yhs-newtab&ts=sy&type=YHS_SANM_209692&u_ip=173.89.241.28&obt9bpdyed=0&p=refrigerator+service%252Fusers+manuals¶m1=ij7zzSxCeE_ZFQBIQUqCls6ZzDPk5C0fmXr92VQU50Ci_HUrMceCf_eB8xx8ruvXD7i6jRVjcmbHw6cejr8oAfbkiqpYD6M0dT7Hk9DcpZAswcb_bYMeat-z4JwdnTmAbWoMlPvO-HDEcgVB9zbc_JQzsRk%2c

I’m happy to assist further over the phone at https://www.6ya.com/expert/david_dc2f9e0a44104720

hi go to lower numbers to lower temp jim

you will need to replace the main control board located on the rear panel behind an access panel,this board controls all temps and digital readouts,when the readout goes dark this board is the culprit

call tech. support

yes it is frost free refrigerator

The board will not fix the problem if the heater or the hi temp limit is bad. It sounds like the "computer" is not the problem. Have someone come out and diagnose the problem.

Compressor 12/3 with 20 amp dual pole breaker. 220 VAC

Freezer 12/3 with 20 amp single pole breaker 120 VAC

you are leaving the door open to long

Check the evaporator coil for frost buildup on the back. Check for frost on the suction line, the biggest line returning to the compressor. If frost is evident at these places you have a defrost system problem. These systems have a defrost timer that defrosts the coil at preset times. Check the timer for proper operation by marking the position of the dial and check back to see if it changes. If it does not change position the timer motor is most likely bad. If the dial is not rotating automatically you can manually turn the dial in the direction of the arrow and put it through a defrost cycle.