I recently called my apartment maintenance for a broken air conditioner. I informed them I had to leave town but would return that night. This was on Saturday. When I returned, the air conditioner was still broken, so I unplugged the thermostat from the wall and plugged it back in. This worked. I called maintenance early next morning and let them know the air was now working. That afternoon the air conditioner service arrived. I told him it was now working and asked him if maintenance had called him. He said no, and wanted to check out the air. He did and found nothing wrong. Since then, the air has gone out twice more and the air conditioner service has been out twice. The last time they replaced the thermostat and a relay. Now, my apartment maintenance has sent me a bill for emergency service. Am I under any obligation to pay this?