Automatic Temperature Control: Adjustment: Notes

NOTE: Some adjustments require the specific use of ATC tester J-23678 to check settings. Because of difference of operation with the new MK II programmer (programmer moves toward A/C mode, not heat mode, when system is shut off or disconnected at the programmer), a new diagnosis card, J-23678-50, is required. This new card is clearly marked for use with the MK II programmer. Refer to tester instructions for specific connections to be made during adjustments.