Haier Er01

Haier error code ER01 indicates: Haier Series 4 / 6 Chef@Home & I-Message Connected Oven: Cavity temperature sensor open circuit Er01; electronic controller reads infinite resistance from the PT500 / PT1000 oven probe..

The primary root cause for Haier code ER01 is: On Haier ovens utilizing Chef@Home multi-zone convection system, high-precision cavity thermal probe, and I-Message electronic controller: Broken platinum resistor probe inside cavity, heat-damaged silicone wiring behind rear insulation, or loose PCB terminal..

To resolve error code ER01: Isolate power at breaker. Disconnect sensor plug at rear. Measure probe resistance (~538 Ω for PT500 or ~1078 Ω for PT1000 at 20°C). Replace if infinite. Touch Settings menu on display, select System Reset, hold confirmation checkmark for 5 seconds, or power cycle breaker for 60 seconds.

Resetting power (unplugging for 5–10 minutes) clears temporary memory errors. However, if Haier code ER01 persists, the physical component causing On Haier ovens utilizing Chef@Home multi-zone convection system, high-precision cavity thermal probe, and I-Message electronic controller: Broken platinum resistor probe inside cavity, heat-damaged silicone wiring behind rear insulation, or loose PCB terminal. must be inspected or replaced.

Set a digital multimeter to ohms (Ω). Disconnect power and test NTC Temperature Sensor Probe (Thermistor) across Across sensor pins 1-2 (unplugged harness). Expected nominal reading is 4.8kΩ–12kΩ (at 20°C–25°C). Tolerance: Negative temperature coefficient: resistance drops smoothly when warmed with fingers. OL = open circuit..

Standard electrical safety protocol: 1. Disconnect 230V mains power before opening panels. 2. Verify zero voltage at test points. 3. Allow hot water or heating elements to cool below 30°C before handling.