Best Thermostat Repair in Tucson AZ

They installed a water conditioning system for us and it turned out great! They were very friendly, professional and offered a quick turn around time. We are very satisfied with them and will definitely recommend to others and used them in the future. Thank you guys!

We had a 23 yr old HVAC problem, getting cold air only.  They came out the same day to give us an assessment and options to fix or replace. We decided to replace on Tuesday, and it was installed on Thursday.  Warm and cozy just in time for the freeze.
The men who came to do the work were great. Showed up on time, were courteous and kept us informed as they worked.  They also saw our solar water heater and noticed that there was a leak and suggested we have another Parker look it over.  
I'll right another review once that job is complete.  I'm confident it will be another great job.

We used Williamson's for a couple of different projects including HVAC work and replacing a water heater.  They do great work and the employees are genuine and courteous.  We had a problem with one project and after contacting John Paul with our concern, he promptly sent Wally out to take care of the problem.  Wally is awesome!

Very nice technician but somewhat absurd pricing, at least for AC repair.  After the fact (my fault) and after doing some research, I realized that I got charged $349 for a $30 part and replacing a part that any handyman could have done.  I tried googling the part and couldn't find it.  Turns out on the invoice, they list a description of the part (inline current controller) instead of the actual part (?capacitor) and name for the service (which anyone could find in seconds).  Feel like I dope for being duped.  I understand the need to make a money but charging 10 times for a part is ridiculous.  Labor (about 1 hour) was nearly $150 in addition to the service call.  Doctors don't even make $150/hour and they save lives!

6/8/16:
Thanks for your reply. While I understand the costs of running a business, some markups are unreasonable. This was a weekend call and in this case I think around $300-350 would have been reasonable and adequately covered your company costs and time without gouging the consumer. I uploaded a copy of the invoice.

Tried to schedule an appointment for the $79 package, the person on the other line told me their earliest was July.  I need it serviced before the heat of the summer!  My unit is 22 years old, I do not care how good their service claims to be, I am not going to wait till the start of the monsoon to get a simple AC service.  the system is going to go out soon, and believe me, I WILL NOT be buying a system from them...Once again, companies like these show me the importance of having a home warantee...their service may be the best around, but it is worth nothing if my system breaks down before they can service it.

Thank you thank you strong built. I have several medical issues and installed a walk-in jetted tub 12 years ago. The fixtures had gone bad and it was taking 45 minutes to fill and I couldn't get enough hot water. They took the bad parts out but were unable to find replacements for them so we bought a new quality set of fixtures and they install them. I had a wonderful hot bath tonight that filled in only 15 minutes and I actually had to turn the hot down.
They have a wonderful care membership package that keeps me assured that all of my plumbing needs are taken care of and they are very reliable and kind people.
Thank you so much!