What does Gree error E4 mean?
E4 means the gas leaving the compressor got too hot, so the compressor stopped. Most often it points to low gas, or an outdoor unit that cannot cool down.
Why does code E4 appear?
- Low gas, usually because of a small leak.
- The outdoor coil is clogged with dust.
- The outdoor fan is not working properly.
- A blocked capillary or expansion valve.
What can you safely check for E4?
- Switch the power off for 5 minutes, then start the AC again.
- Clean the filters and keep space open around the outdoor unit.
- Look for an oily stain at the pipe joints. It can be a sign of a leak.
Safety: never reach into an electrical panel, board, gas pipe or the inside of an inverter yourself. You can get a shock or release gas. This is a mistri's job.
When should you call a mistri?
If E4 keeps coming back, call a mistri. Measuring gas pressure, finding leaks and refilling gas is only for a trained mistri. Never open a gas pipe or valve yourself.