The sensor on the thermostat was buried in the back of the left hand bottom corner of the utility panel


The panel was turned around 180 degrees and the thermostat was mounted 1/2 inch away from the panel surface


.The spacer is a CARLON A410 Single Gang 1/2" Raised Cover that can be found in the electrical section of Lowes or Home Depot

.The Coach temperature now stays within one degree or less of the setting


compared to the annoying two or three degrees temperature variation before the modification.