Bosch 00170857 High-Limit Thermostat OEM Part

Product Details

Genuine Bosch part. Bosch brands include Bosch, Thermador, Gaggenau, and others. See all items in Dryer Fuse Or Sensor.

Cross Reference Information

Part Number 00170857 replaces AP2805407, 170857, 423792, AH3439477, EA3439477, PS3439477, PS8697400.

Description

This high-limit thermostat is the overheat safety switch for the heating circuit. It opens when excessive temperature is detected to cut power to the heater, protecting the appliance and restoring normal heating when replaced.

• Monitors temperature at the heater and opens the circuit if it overheats
• Helps prevent damage from excessive heat and potential safety hazards
• A failed-open thermostat may cause no heat, poor drying, or unusually long cycles
• Frequent tripping may point to underlying circulation or control issues that should be checked

What's included: 1 high-limit thermostat

• Disconnect power at the breaker or unplug the appliance; allow it to cool completely before service
• Access location per model; typically mounted on or near the heater or heater housing
• Note wire positions and transfer leads one at a time; secure using existing mounting hardware
• After installation, run a test cycle to confirm proper heating