Leak on factory solder joint at the right side of circulator pump. There’s no drain on this so we’re gonna have to remove the circulator pump vacuum the water out side of the joint. Heat was coming on when there was a call for air-conditioning tested thermostat several times he didn’t come on. However, didn’t find any nicks in any of the wires if it happens again will replace the thermostat as I can’t see anything else that turns the heat on with the air conditioner?