Grant Sensor Probe Direct H/W Mpcbs98 Pcb Vortex Pro Combi

Post Sept 2008 White DHW

Grant Sensor Probe – Direct Hot Water (MPCBS98)

Genuine Temperature Sensor for Grant Vortex Pro Combi Boilers

The Grant MPCBS98 Sensor Probe is a genuine hot water temperature sensor designed for use with the Grant Vortex Pro Combi range. This sensor works in conjunction with the boiler’s PCB to monitor the temperature of the direct domestic hot water (DHW) output, ensuring consistent performance and safety.

Accurate temperature control is vital in combi boiler systems, and a reliable sensor like the MPCBS98 ensures your boiler delivers hot water at the correct temperature, avoiding overheating or lockouts. Whether you’re diagnosing a fault or replacing a worn part, this OEM sensor is the ideal solution.

 Key Features & Benefits

• Official Grant Part – MPCBS98
  Manufactured to Grant’s specifications for seamless integration with your Vortex Pro Combi boiler.

• Direct Hot Water Sensor
  Monitors the temperature of the DHW output, ensuring efficient heat delivery and user safety.

• Precise & Responsive Readings
  Sends accurate data to the boiler PCB for real-time adjustments during hot water demand.

• Pre-wired with Connector
  Ready to plug directly into the control board for fast and hassle-free installation.

• Improves System Efficiency
  Helps optimise energy use by reducing unnecessary burner cycling or overheating.

• Built for Long-Term Durability
  Made from high-quality materials designed to withstand temperature fluctuation and long-term operation.

 Compatible Grant Boiler Models

The MPCBS98 DHW Sensor Probe is compatible with:

• Grant Vortex Pro Combi 21kW

• Grant Vortex Pro Combi 26kW

• Grant Vortex Pro Combi 36kW

• May also suit other Grant combi boilers that use the same sensor/PCB configuration

If you're unsure whether this part is suitable for your boiler, contact our expert team with your model or serial number and we’ll be happy to help.

  When Should You Replace the DHW Sensor Probe?

Replace the MPCBS98 sensor if:

• The boiler shows inaccurate hot water temperatures

• You experience hot water lockouts or overheating

• The control board displays a sensor-related fault code

• The probe is damaged, corroded, or showing signs of wear

Faulty or inaccurate temperature readings can affect performance, energy use, and user comfort—replacing the sensor ensures your boiler operates correctly.

 Technical Specifications

• Part Number: MPCBS98

• Manufacturer: Grant UK

• Type: Direct hot water sensor probe

• Material: Stainless steel probe with heat-resistant wiring

• Cable: Pre-attached, plug-and-play connection

• Function: Monitors DHW temperature and sends data to PCB

• Installation: Fits into DHW pipework or heat exchanger (check boiler manual)