1st tech showed up day before scheduled but had no tools. No one showed up on scheduled day being Tuesday. No one again on Wednesday or Thursday so we contacted your company again for a Tech to show up on Friday but only could clean unit which we already did (our maintenance tech). Your tech says installation company will have to be contacted if any more problems that their company only has the replacement part if needed. So this service call cost solved nothing. Since our maintenance tech cleaned unit we have not had another trouble alarm.