Learn
Learn
How to Clean a Mini-Split (Filter & Coil Guide)
The filters are washable, so this costs nothing but a few minutes every couple of weeks. Here's the full process - and the four jobs you shouldn't attempt yourself.
Read more
What Is a SEER Rating? A Plain-English Guide
It's miles per gallon for your air conditioner - but the number changed in 2023, and higher isn't automatically worth paying for. Here's how to read it.
Read more
How Much Does a New AC Unit Cost? 2026 Guide
The national range is $3,000 to $15,000 installed - but equipment is often the smallest piece of it. Here's where the money actually goes, and the part you don't have to pay twice.
Read more
How Does a Mini-Split Air Conditioner Work?
No ducts, a three-inch hole in the wall, and one outdoor unit that can run four rooms at different temperatures. Here's what's actually happening inside a mini-split system.
Read more
What Does "Dry Mode" Mean on an AC?
That water-droplet setting on your remote isn't just a second cooling mode. Here's what dry mode actually does, when it's the better choice, and where it runs out of road.
Read more
Furnace Keeps Shutting Off Before the House Is Warm: Safety Lockouts and What Trips Them
When a furnace lights, runs a few minutes and shuts off before the house warms, a safety switch is usually stopping it: high limit, flame sensor, pressure
Read more
Furnace Smells Like Burning: Normal First-Run Dust or a Real Problem?
A burning smell from the furnace is often dust on the first cold day. How to tell normal from a warning: electrical, oily, plastic, rotten-egg gas and exha
Read more
Furnace Rollout Switch: Why It Trips and Why You Should Never Just Reset It
A furnace flame rollout switch trips when flames escape the burner area. What it protects against, why it trips (blocked flue, cracked heat exchanger, low
Read more
Furnace Condensate Drain: How It Works, Why It Clogs and What Happens When It Does
High-efficiency furnaces make water. Where the condensate drain goes, the trap, the pump and the neutralizer, the signs of a clog, and the shutdowns and le
Read more
Furnace Types Compared: Single-Stage, Two-Stage, Modulating and the Blower That Goes With Them
Single-stage, two-stage and modulating gas furnaces compared on comfort, noise, efficiency and cost, plus why the blower motor matters as much as the burne
Read more
Furnace Inducer Motor: What It Does, What Failure Sounds Like and What It Costs to Fix
The inducer motor starts every heating cycle by pulling exhaust out of the furnace. What it does, the noises and error codes of a failing one, why it fails
Read more
Furnace Control Board: The Furnace's Brain, Its Error Codes and When It Fails
The furnace control board runs the heating sequence and reports faults through a blinking light. How it works, how to read its codes, what kills boards, an
Read more
