Blogs
Compressor Failure vs. Capacitor Failure: How to Tell the Difference Before You Buy Parts
Humming but won't start? Before you order a $2,000 compressor, run this 5-minute test to find out if a $20 capacitor is the real problem.
Read More →Round vs Oval AC Capacitors: Does the Shape Actually Matter?
Round or oval, does the capacitor's shape actually affect performance? Here's what really matters when you're matching a replacement part.
Read More →HVAC Technician Truck Stock List: Capacitors, Contactors & Transformers You Should Always Carry
The capacitors, contactors, and transformers every service truck needs, common sizes, ratings, and a sample stock list to keep your first-visit fix...
Read More →What the 24V Transformer Does in Your Furnace or AC (And How to Tell It's Failed)
The Part That Powers Everything That Thinks Your air conditioner and furnace run on 120 V or 240 V. Your thermostat, the contactor coil, the gas v...
Read More →Why Your AC Contactor Is Buzzing or Chattering (And What to Do About It)
That Buzz Is Telling You Something A healthy contactor makes one sound: a single click when the thermostat calls, and another when the call ends. ...
Read More →Dual Run vs Single Run Capacitors: What Your AC Uses and Why It Matters
Two Capacitors, Two Different Jobs Most air conditioners have more than one capacitor, and they are not interchangeable. Knowing which kind you ar...
Read More →AC Running But Not Cooling? 7 Causes (From Easiest to Hardest Fix)
The Fan is Running But There's No Cold Air — What's Happening? This is one of the most common summer HVAC complaints. The system appears to be run...
Read More →2-Pole vs 3-Pole Contactor: Which One Does Your HVAC System Need?
The Number of Poles Matters — Here's Why When you search for a replacement contactor, one of the first specs you'll see is the number of poles. Ge...
Read More →Why UL Certification Matters for HVAC Parts (And How to Verify It)
Not All Replacement Parts Are Created Equal Amazon and eBay are flooded with cheap HVAC capacitors, contactors, and transformers. Many cost half o...
Read More →Pre-Summer AC Checklist: 7 Things to Inspect Before the Heat Hits
A simple 30-minute spring inspection can save you from a costly emergency AC breakdown in the middle of summer.
Read More →AC Contactor vs Capacitor: What's the Difference and Which One Failed?
AC won't start? It's usually either the contactor or the capacitor. Here's how to tell which one failed.
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