Grant Control / Limit Immersio Gcs11 Stat - All Models

thermostat 25 C/65 C adjustable & 80 C limit c/w " pocket

Grant Control / Limit Immersion Stat – GCS11

Part Number: GCS11
Suitable for All Grant Cylinder Models

The Grant GCS11 Control / Limit Immersion Stat is a genuine OEM safety thermostat designed for use in all Grant hot water cylinders and thermal stores. Acting as both a primary temperature control and a safety cut-out, this dual-function stat ensures safe, efficient operation of your immersion heater by regulating water temperature and preventing overheating.

Easy to install and universally compatible with Grant cylinders, the GCS11 is an essential replacement component for maintaining performance, efficiency, and compliance with UK safety standards.

Key Features

• Dual-function stat – provides both control and safety limit temperature regulation

• Compatible with all Grant cylinders including unvented and thermal store models

• Direct fit replacement – pre-calibrated for quick installation

• Maintains optimal hot water temperature and prevents overheating

• Helps meet Building Regulations (G3) and safety requirements

• Durable construction for long service life

• Suitable for retrofit or new installations

Compatible With

• All Grant hot water cylinders

  • Grant DuoWave

  • Grant Wave

  • Grant Thermal Stores

  • Compatible with both standard and solar-ready models

  • Fits immersion heaters with thermostat pockets

 Ideal for engineers working on Grant unvented systems or homeowners needing a reliable thermostat replacement.

When to Replace

• Immersion heater not heating water correctly

• Safety cut-out has tripped and won’t reset

• Stat body appears corroded or damaged

• As part of routine service or fault diagnosis

Technical Specifications

• Part Number: GCS11

• Function: Dual – Control & Safety Limit

• Application: Immersion heater thermostat for water temperature control

• Thermostat Range: Typically 30°C to 85°C (limit set to approx. 98°C)

• Compatibility: All Grant cylinders and thermal store models

• Regulation Compliance: G3 Building Regulations and electrical safety standards