I live outside Metro Atlanta, in a town called Woodstock. I recently paid a "reputable" firm to come to my house to give my AC units a tune-up. Yes, it was the cooling systems I wanted checked. I made the appointment 2 weeks in advance.
The night before the appt, a cold front swept through and I turned on the heat. Both units started up and kept the house warm all night. The next morning the AC company shows up for their job.
After about an hour, he tells me my downstairs furnace is fine, but my upstairs furnace needs a new pressure sensor. He has flipped the switch on my unit so it doesnt run, and tells me it will be a little over $$$$ to replace the sensor.
I do what any DIY saavy person would do (and no, I am not asking for DIY advice here now), and went online to read about these things and see how hard they are to replace, etc. These things are a hose and 2 wires (a common and an ON connection). So for $$$$ I order a replacement for the model number i pulled off the furnace upstairs, and a new one came a few days later.
The hook-up was really simple. I mean, seriously. I checked the hose for obstructions, and plugged the wire from the old COM to the new COM, and from the old ON to the new ON.
Anyways, I replaced it and closed up the system and flipped the switch. The unit came on immediately even before my thermostat powered up. It is on constantly now, blowing cold air. The heater never engages.
So to my question: Did this guy do something to my furnace so that it wont run right unless he comes back and changes what he did? I mean, I believe in getting professionals to handle the hard stuff, but could not see myself forking over more than $$$$ for something that was working when he walked in the door. Now my upstairs unit just blows (literally and metaphorically).
What should it cost to have this sensor replaced? I have a Rheem Criterion 2 with a .30 pressure sensor (42-23648-03). Should I call someone else? I could really use an unbiased opinion on how I should proceed. Its getting kinda cold upstairs on some nights. I just don't want to get ripped off.
PS - The guy when he arrived refused to even look at the AC part of my units, told me he was here for the furnace only. So I still never got the AC tuneup I was looking for.