Choose your Friedrich appliance
About Friedrich
Friedrich is an American air conditioning company based in Texas, known for room, through-the-wall and portable air conditioners. Its codes appear on the unit's control panel and differ between product lines.
Friedrich air conditioner error codes
- E1Short cycling or a sensor fault, depending on model
- E2Stuck button or a sensor fault, depending on model
- E3 / E4Frost probe open or shorted
- E5 / E6Room temperature probe open or shorted
- CHECK FILTERFilter cleaning reminder
Before you start
- Find your model number. It's on the rating label, usually inside the door or lid, on the frame, or on the back or side panel.
- Try a reset. Unplug the appliance or switch off its breaker for 10 minutes. Many codes are one-off glitches.
- Stay safe. Never bypass safety switches or work on live wiring, gas or refrigerant lines. Each guide tells you when to call a technician.