Frozen Coil
Ice on the indoor coil or suction line.
AC Leaking Water Inside: Condensate Drain, Float Switch and Pan Problems
Why an air handler or furnace coil leaks water indoors, how to find the cause fast, and how to clear and protect the condensate drain so it doesn't come back.
AC Short Cycling: Why the Compressor Turns On and Off Too Often
How to diagnose an air conditioner or heat pump that short cycles, using how long it runs and what stops it: thermostat problems, safety switches, low charge, airflow, and oversizing.
Heat Pump Defrost: How It Works and How to Troubleshoot It
How heat pump defrost works on time-temperature and demand defrost boards, what's normal during defrost, and how to diagnose a heat pump that ices up or defrosts too often.
How to Find a Refrigerant Leak: Methods, Common Spots and the Standing Pressure Test
A step-by-step leak search for AC and heat pump systems, the leak detection methods and where each works best, the most common leak spots, and how to confirm the repair.
AC Not Cooling? A Step-by-Step Diagnostic Checklist for Techs
Work an AC no-cool call in the right order, from the thermostat call to airflow, electrical and refrigerant charge, without guessing.
Frozen Evaporator Coil: Causes, Safe Thawing and What to Check
Why AC evaporator coils freeze, how to thaw one safely, and the order to check airflow, charge and metering once it's thawed.