Heating and Air Conditioning Service Repair and Replacement. Call 203-269-1600 or 800-269-9995 for service today. All brands and models of heating and air conditioning equipment worked on and replaced by Climatech Mechanical Heating and Air Conditioning Services. We service the state of Connecticut from our Central location of Wallingford, Connecticut. Call Today To Schedule a Maintenance, Repair service, or replacement service.  Today Licensed Professional Connecticut Expert Services.