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What is the part number off the thermostat AND the control module in the ceiling?
Please describe the problem...........no fan or compressor or both?
What is the issue here?
Take the yellow compressor lead loose from the thermostat and touch it to the red lead on the thermostat and see if the compressor comes on. IF so, the thermostat is bad. IF not, the module is probably bad. Those have been replaced by a newer set called a Single Zone thermostat which has a digital readout. Not hard to wire up.
See the attached link for the 3 versions...........depending on what you want to hook up. Yours should be the first one.
Were you able to find a good source for those parts? IF you need help with the installation, please come back to this posting thread as all follow ups are included in our fee.