Customer had no heat on main floor zone, thermostat was set to heat with a call of 72 degrees but only 58 in home, zone valve not calling, checked wiring at thermostat which everything connected but found prong bent for r wire, fixed prong and thermostat made contact, found first floor main floor one to have bad zone valve, replaced zone valve and tested zone valve opened, waited until supply and return pipes got hot felt baseboards on main floor when he all began to get hot, customer is newer to home and their were no service tape present so customer also signed up for maintenance agreement as well. System operational,and working.