Ac repair: came out to install a control module for the duct detector. Noticed the compressors were not running at the time due to issue with the control board. Will return to replace board. Returned to replace board and also the thermostat. After replacing the board units first compressor kicked when It had previously not been. the second compressor did not however due to thermostat issue. Replaced thermostat and it fixed issue with the the second compressor. Both compressors were running at the time of leaving the job site.