I had a similar experience as another customer trying to get a NEST installed. I called precision and explained my situation: I had recently bought a NEST, but my current thermostat is wireless. So I would need to have a wire run about 4 feet directly above the unit and installed to the unit and the thermostat. The service agent said that the wire installation would be included in the $60 service fee and installing the NEST would cost $175. Pricey, but I decided to do it. They technician showed up as scheduled the next day and I showed him the unit and the thermostat and explained the situation. I then had to leave for work, but was available by phone. He called about 15 minuted later and explained that he would need 'a couple of installers' to come and install the wire and that it would cost $625. I was completely shocked. I was also confused because I thought that service was included in the 'service fee' and thought he was the installer. There is no way, just absolutely no way that running a wire all of 4 feet should cost $450 and require 2 people to do it. Clearly I wasn't going to accept a 300% price increase from the already pricey quote I received. After I told the technician that I wasn't going to pay $625 to have the wire installed he wanted to argue with me about paying a $60 service fee for which he had no basis to collect. No service was provided. If he thinks he gets $60 for ringing my doorbell and walking around for 15 minutes then I am changing careers.
I am certain that I adequately explained the situation to the customer service agent and got a quote based on that information. The technician did not find anything different than what I had described. So, either the customer service agent doesn't know the business or this was a bait and switch. Though about 2 stars because he was on time, but decided on one because he was rude on the phone and walked into my house with really, really dirty shoes.
*** UPDATE***
I spoke with Sandra and while she was polite, we didn't get anywhere. I offered to allow Precision the opportunity to be true to their word and perform the work at the price they quoted and she declined to do so.
Sandra, I made it crystal clear in my initial phone call that I have a wireless thermostat and that the NEST would need to be wired into the unit and again explained and showed the technician exactly what work had to be done when he arrived. There was no diagnosis needed or performed.