Derek ColeGM, Simmons One Hour Heating & Air · AI HVAC Answers

DIY Thermostat Installation: Professional Install vs. DIY Disaster #shorts

7 Oct 2026 · 1 min

Watch on YouTube

0:46

In this YouTube short, Derek Cole warns viewers against attempting a do‑it‑yourself thermostat installation. He explains that many customers who try to wire a thermostat themselves end up damaging the system—blowing transformers or fuses—causing the entire HVAC unit to stop working. Cole notes that his team can come out to fix these problems, but emphasizes that hiring a professional to install the thermostat (and obtain a warranty) is the safer, more reliable choice. He ends by inviting viewers to share their own thermostat‑installation experiences in the comments.

Chapters

Do-it-yourself thermostat installation. Yay or nay? I'm going to go with nay only because, yes, you can do it yourself. But we've had so many customers call in and have trouble with the DIY thermostat because they touch wires, they don't wire it up right. All of a sudden they blow a transformer, blow a fuse. Now the whole unit's not working and now we have to come out and we have to fix everything, which we don't mind doing, by the way. Actually, what we do is come out and fix the problem. So if you have a thermostat in mind We can install it for you. Get a professional to install it. Get a warranty with it. Don't do it yourself. Have you ever tried to install your own thermostat? Look, it's okay. Between me and you, let me know in the comments what happened.