Arrived to the customer house. The customer wanted the system to bleed. But I explained to him that to do that, he first had to make a minor diagnosis. The customer approved the minor diagnosis. I proceeded to check the system, when I turned on the thermostat the unit did not work. I proceeded to open the wires box of the unit and noticed that a cable was loose from a safety switch, I proceeded to check the safety switch and it was not damaged. Recommended replace the safety switch. Customer say he want to doing by him self. Customer declined the estimate. Customer is happy with the service.