Delaware Heating & Air Conditioning was the contractor for Handler Construction for my house in the development Belden. My heater and A/C was intermittently running. I hired another company to check the system. The cause was a semi-blocked internal drain. The Delaware Heating & Air Conditioning installer had left PVC shavings inside the furnace. Water would collect inside and could not drain properly. The system sensed this and shut off. The water slowly drained and the system came back on temporarily. Now that the drain is clear the system works properly.
