THERMOSTATS

One of the most common “my thermostat is broken” calls I get is actually just a locked thermostat. With Sensi thermostats, that confusion happens a lot because the lock is usually controlled from the app, not from the thermostat screen. In this guide, I’ll walk you through the real-world ways to unlock a Sensi thermostat, … Read more

If you’ve ever looked at your thermostat’s fan options and thought, “Auto I get. On I get. But what is CIRC?”, you’re not alone. In plain English, CIRC means Circulate. It’s a fan setting that runs your HVAC blower intermittently, even when your system is not actively heating or cooling. The goal is to keep … Read more

If you’re wiring or replacing a Coleman Mach RV thermostat, here’s the most important thing I want you to know before you touch a single wire: Coleman Mach thermostats are 12V DC control systems (from your RV batteries and converter), not 24V AC like a house thermostat. I’ve seen a lot of good DIYers get … Read more

I’m Nathan, and I’ve worked as an HVAC technician for over 10 years. Fujitsu systems are some of my favorites because they’re efficient, quiet, and smart. But I’ll be honest with you, the thermostat or remote symbols can look like a tiny row of “mystery icons” until someone explains what they actually mean. In this … Read more

If your Amazon Smart Thermostat is set to cool but you’re getting warm or hot air from the vents, you’re not alone. I’ve walked into plenty of homes where the “thermostat is broken” wasn’t the real problem at all. Most of the time, it comes down to one of these issues: This guide walks you … Read more

Hi, I’m Nathan. I’ve worked as an HVAC technician for over 10 years, and I’ve run into Verdant thermostats in hotels, apartments, and commercial buildings more times than I can count. They’re solid thermostats, but they’re designed to save energy first, which is why they sometimes feel like they’re “fighting you” when you try to … Read more

Hi, I’m Nathan. I’ve been an HVAC technician for over 10 years, and I’ve wired more thermostats than I can count, from basic single stage systems to heat pumps with backup heat and two stage equipment. If you’re staring at six thermostat wires and wondering where they go, you’re in the right place. Here’s the … Read more

Hi, I’m Nathan. I’ve worked as an HVAC technician for over 10 years, and I’ve wired (and re-wired) more Honeywell thermostats than I can count. If you opened your thermostat and found 7 wires, you’re usually looking at a heat pump setup with both Auxiliary heat and Emergency heat, which is the most common reason … Read more

I’m Nathan, and I’ve worked as an HVAC technician for over 10 years. When someone tells me, “My Ecobee is on, but the house is cold,” the issue is almost always one of three things: In this guide, I’ll walk you through the same checks I do in the field, in the right order, so … Read more