Heat Pump Tripping the Breaker: Why It Happens and When to Stop Resetting
A breaker that trips again is detecting a real fault. What the timing of the trip tells you, and why repeatedly resetting one is dangerous.
Continue readingHome / Troubleshooting
Heat Pump Troubleshooting
Error codes, strange noises and what you can safely fix yourself.
Heat Pump Leaking Water: Where It Comes From and What to Do
Water pooling outside during winter is usually normal. Water anywhere near the indoor unit is not, and one cause accounts for most of it.
Continue reading
Heat Pump Making Noise: Which Sounds Are Normal and Which Are Not
Some alarming noises are the system working correctly. A few are warnings you should not run through. The difference is usually easy to hear.
Continue reading
How to Stop Auxiliary Heat From Coming On
Aux heat costs several times more per unit of warmth than the compressor. Four settings decide when it engages.
Continue reading
Heat Pump Not Defrosting: Why Ice Keeps Building Up
Frost that clears on its own is normal. Ice that keeps growing means the defrost cycle is not running, and that is a fault.
Continue reading
Heat Pump Blowing Hot Air in Cool Mode: What to Check
Set to cool and getting heat means the refrigerant is flowing the wrong way. Two causes account for nearly all of it.
Continue reading
Heat Pump Error Code Lookup
Type a fault code from a Mitsubishi, Daikin, LG, Fujitsu or Carrier system and see what it points to, what you can check yourself, and when it needs a technician.
Open the tool
Carrier Heat Pump Error Codes: Infinity Screens and Board LEDs
What you can read depends on your control platform. Infinity reports numbered faults on screen; conventional systems blink an LED inside the panel.
Continue reading
Fujitsu Mini Split Error Codes: Reading the Blinking Lights
Most Fujitsu indoor units have no display, so the fault arrives as two lamps blinking. Knowing how to read them matters more than the code list.
Continue reading
Heat Pump Short Cycling: What Counts, What Causes It, What to Check
Every compressor start is the hardest thing your system does. A heat pump that starts and stops every few minutes is shortening its own life.
Continue reading
Heat Pump Troubleshooting: Find Your Symptom, Get the Checklist
Start from the symptom you actually have. Each section gives you the two-minute version, then links to the full diagnosis.
Continue reading
Heat Pump Not Turning On: An 8-Step Checklist Before You Call
A heat pump that will not start is usually something small. Fifteen minutes of checks, in the order that finds the cause fastest.
Continue reading
The Heat Pump Defrost Cycle: What It Does and What Is Normal
Your heat pump periodically stops heating your house to melt ice off the outdoor coil. Nearly everything alarming about that is the system working correctly.
Continue reading
Heat Pump Smells Like Burning: When It Is Normal and When to Shut It Off
Most burning smells are dust cooking off the heat strips and clear on their own. A few are electrical faults that need the breaker off now.
Continue reading
LG Mini Split Error Codes: Reading CH Codes and Blink Patterns
LG shows faults as CH codes, or as blink patterns on units without a display. The numbering is not consistent across product families.
Continue reading
Daikin Mini Split Error Codes: How to Read Them and What to Check
Daikin codes are a letter plus a number, and the letter tells you which subsystem is complaining. That makes them easier to triage than most brands.
Continue reading
Why Your Heat Pump’s Auxiliary Heat Won’t Turn Off
Aux heat costs 2 to 5 times more to run than your heat pump alone. Here is when it running is normal, and when it means something is actually wrong.
Continue reading
How to Reset a Heat Pump
A soft reset from the thermostat, a full power reset from the breaker, how to find a dedicated reset button, and when a reset is the wrong move.
Continue reading
Heat Pump Blowing Cold Air on Heat Mode: 7 Causes, Ranked
Start with the two possibilities that are completely normal, then work through the five that are not. Most cases resolve without a service call.
Continue reading
Mitsubishi Mini Split Error Codes: How to Read Them and What to Check
Mitsubishi reports faults as two-character codes and as LED blink patterns. Here is how to retrieve a code and what the major families of codes point to.
Continue reading
Heat Pump Frozen Outside: When It’s Normal and When It Isn’t
A light coating of frost in winter is expected. A block of ice encasing the coil or ice on the top of the unit is a problem you should not ignore.
Continue reading