Description
The Laars Heating Systems E0253900 Thermistor Probe is a genuine OEM replacement temperature sensing component engineered for use with compatible Laars boilers and heating systems. Thermistor probes play a critical role in hydronic heating performance — they continuously monitor water or supply temperatures and relay that data to the system control board, enabling precise modulation and safe operation.
Key Features
- Genuine Laars OEM replacement part — ensures compatibility and reliable fit
- Thermistor-based temperature sensing for accurate, real-time temperature monitoring
- Designed to integrate seamlessly with Laars boiler control systems
- Supports proper system modulation and overheat protection
- Direct drop-in replacement to minimize downtime during service calls
Why Choose a Genuine OEM Thermistor Probe?
Using a genuine Laars replacement thermistor probe ensures your boiler control system receives accurate temperature data, preventing nuisance shutdowns, inefficient cycling, or unsafe operating conditions. Aftermarket substitutes may not match the exact resistance curve required by the Laars control board, potentially leading to misread temperatures and system faults.
Compatibility
- Designed for use with select Laars Heating Systems boilers and water heaters
- Consult your equipment model and service manual to confirm fitment prior to installation
Application
- Residential and light commercial hydronic heating systems
- Boiler water temperature sensing and monitoring
- Replacement during routine maintenance or fault diagnosis







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