Work Performed Responded to a no cooling call where the client reported no air conditioning all weekend. They tried turning the cooling on again the night before my visit, and it seemed to start working. Upon arrival, I found that both the heating and cooling were running at the same time. After troubleshooting, I traced the issue to a stuck relay, which was causing the heating contactor to intermittently activate even when there was a call for cooling. This caused warm air to blow through the vents and prevented proper cooling. I also discovered that the boiler and hot water tank were not operating properly. The boiler was cold to the touch and was stuck in an ignition loop, repeatedly trying to restart. It eventually fired up just before I left. This home uses a high-velocity air handler that works with a boiler-fed coil for heating. Since the boiler wasn’t providing hot water to that coil, the heat side effectively shut down — which may be why the cooling finally started working