A code tells you what tripped, not why. Enter it in ACLogics and get the next check, then the one after that, until you find the real fault. Carrier, Trane, Daikin, Lennox, Goodman, Rheem, York and more.
Type a code or filter by brand to see what it points to and where to start checking:
A simple code translation tells you what tripped — not why it tripped or what to verify next.
Pick the brand on the unit to see its codes and what to check:
Starting a new diagnosis from a code needs internet. Start it in the truck, and you can keep reading the steps and recording your checks in the basement with no signal. What works offline.
Yes. Type the code, describe the flashes, or describe what the equipment is doing (for example, "igniter glows but burners never light"). You don't need a code to start.
It tells you what to measure next with your meter or gauges. Record the reading, and causes it clears get ruled out, so you find the real fault before you swap a part.
Try it free
Download ACLogics on iPhone, iPad, or Android today. Try for free — no credit card needed. Enter the code on your next call and see what to check first.
