Ideal Boiler Dry Fire Thermistor Kit Flow / Return 176203

Product Overview

The Ideal Dry Fire Thermistor Kit (Part Number: 176203) is a temperature-sensing component kit designed for selected Ideal commercial boiler systems.

Part number 176203 is identified by Ideal as a Dry Fire Thermistor Kit (Flow / Return), associated with the boiler's primary heating circuit temperature monitoring system.

The thermistors monitor temperature conditions at the flow and return sides of the heating circuit, providing information used by the boiler's electronic controls to supervise operation.

These temperature measurements support the boiler's protective control functions, including the detection of potentially unsafe operating conditions associated with insufficient water circulation or overheating.

ℹ️ Product Condition Options:

This part may be available in New or Refurbished condition. Please select your desired option from the dropdown menu above. Refurbished sensors should be professionally inspected and electrically tested to confirm correct temperature-sensing performance before installation.

Technical Insight & Common Failure Symptoms

The dry fire thermistor kit is associated with the boiler's temperature monitoring and protection system.

Thermistors change their electrical resistance in response to temperature variations. The boiler's electronic control system uses this information to monitor operating conditions and identify abnormal temperature behaviour.

Problems affecting the thermistors or their electrical connections may interfere with temperature monitoring and the boiler's protective functions.

Possible symptoms that may indicate a thermistor or associated control system problem include:

• Boiler entering a temperature-related safety lockout.

• Abnormal flow or return temperature readings.

• Boiler shutting down unexpectedly during operation.

• Temperature sensor-related fault indications.

• Intermittent boiler operation.

• Boiler failing to respond correctly to temperature changes.

• Damaged sensor wiring or electrical connections.

• Visible damage or deterioration affecting the thermistor components.

These symptoms do not necessarily confirm faulty thermistors, as similar problems may result from circulation restrictions, insufficient water flow, wiring faults, control issues or other heating system components. Correct professional diagnosis should be carried out before replacement.

Compatibility

This part (MPN: 176203) is associated with selected Ideal Evomax commercial boiler systems.

Please verify the exact boiler model, serial number, part number, sensor configuration and electrical connections against the manufacturer's technical documentation before ordering to ensure correct fitment.

Safety Advice

Boiler dry fire thermistors and associated temperature protection components are safety-related parts of the appliance's control system. Inspection, removal and installation must only be carried out by a Gas Safe registered engineer who is appropriately qualified for the commercial boiler and work being undertaken.

Always isolate the appliance's electrical supply and allow the heating system to cool before carrying out any work. Where sensor removal involves opening the hydraulic circuit, the system must be safely isolated and depressurised. Follow the manufacturer's servicing instructions and complete all required temperature monitoring, electrical, circulation and operational safety checks before returning the boiler to service.