LG Mini Split Error Codes: All 33 CH Codes Explained
What every LG mini split error code means, from CH01 to CH67, checked against LG documents: what you can check yourself, when to call a technician and what repairs cost.
Bruno Grediaga
Heat Pump Cost in California: Data From 17,445 Real Installs
The typical heat pump cost in California for a central, ducted system in a single-family home was $20,545 in total project cost, across 17,445 installations completed between January 2024 and July 2026. Half of those jobs cost between $16,661 and $26,642, or about $6,187 per ton. These aren’t estimates or survey answers. Every number comes … Read more
Heat Pump Installation Cost by State: 96 Real Homeowner Quotes
Heat pump installation cost by state varies more than most cost guides admit. Across 96 real quotes that homeowners shared between 2024 and 2026, the median installed price before rebates was $19,478, and half of all quotes fell between $14,454 and $24,950. Location mattered most: the Northeast median was $29,600, the South’s was $14,000. These … Read more
Mass Save Heat Pump Rebate 2026: Amounts, Rules, Deadlines
The Mass Save heat pump rebate in 2026 pays $2,650 per ton, up to $8,500, when a heat pump becomes your home’s only source of heating and cooling. Keep your old furnace or boiler as backup and it pays $1,125 per ton, also up to $8,500. Income-eligible households can get up to $16,000, or a … Read more
Heat Pump Blowing Cold Air in Heat Mode: 8 Causes and Checks
A heat pump blowing cold air in heat mode is often doing exactly what it was designed to do. The most common reason is a defrost cycle, which typically lasts 5 to 10 minutes. The second is expectation: heat pump air usually leaves the vents at 85 to 100°F, compared with 120 to 140°F from … Read more
Trane Heat Pump Blinking Light: What Each Flash Means
A Trane heat pump blinking light isn’t automatically bad news. On the outdoor unit’s defrost control board, one flash per second means normal operation. Faster flashing, at two, three or four flashes per second, means the board has detected a problem with the defrost system or the refrigerant circuit. Before you decode a Trane heat … Read more
Carrier Heat Pump Fault Code 84: High Pressure Lockout
Carrier heat pump fault code 84 means “High Pressure Lockout for 4 Hours” on Infinity variable-speed models. The outdoor unit’s high-pressure switch has tripped repeatedly, so the control shuts the heat pump down for four hours to protect the compressor. It’s easy to confuse with code 83, which is the low-pressure lockout. Carrier heat pump … Read more
Daikin Error Code U4: Causes, Checks and Repair Costs
Daikin error code U4 means the indoor and outdoor units of your mini split or heat pump have stopped communicating. Daikin’s official code list calls it a “malfunction of transmission between indoor and outdoor unit.” The system shuts down because the indoor side can no longer tell the outdoor side what to do. The good … Read more
Mitsubishi Mini Split Error Codes: Complete 2026 List
If your Mitsubishi mini split has stopped and is showing a code like P8, E6 or U4, the first letter already tells you most of what you need. P codes point to the indoor unit. E codes mean two parts of the system have stopped talking to each other. U and F codes come from … Read more