Young guy came to check on a 'continual clicking' noise that happens when the temp on the thermostat had been reached. In order to see if maybe we just needed a new thermostat, my boyfriend replaced ours, as he had done several years before, but the clicking continued so we call for service. The guy was there for 30 minutes and acted as though he couldn't figure it out and said 'we needed to replace the thermostat'!!! WOW, really??!! I was so angry but so sick that I didn't even reply to him!! I called another service company out and got my money's worth as he diagnosed the problem and said that the thermostat was perfectly fine!!!! So much for paying you $79!!!!