Professional Home Repair

We received a call to clean the sensor on a water heater, we urged him during the call to replace at that time, he stated he wanted to wait to replace to just clean the sensorWe told him there was no guarantee that the sensor would last just cleaning it, he said its ok, just clean, so we didthe
charge was $when we left the sensor was working, a few days later *** called and asked for a replacement, we could not get in right away and he cancelled the jobWe have invoices to show