Robertshaw ST12-80 Electric Hot Water Thermostat 80°C 30A Reset

Robertshaw ST12-80 Electric Hot Water Thermostat 80°C 30A Reset

Genuine Robertshaw Surface Mount Thermostat – 240V

Restore accurate temperature control to your electric hot water system with this Genuine Robertshaw ST12-80 Thermostat.

Designed for surface-mounted applications, this 80°C thermostat provides reliable thermal regulation and built-in reset protection for safe operation in domestic and commercial electric storage systems.

🔧 Technical Specifications

• Model: ST12-80
• Brand: Robertshaw (OEM)
• Voltage: 240V
• Frequency: 50Hz
• Current Rating: 30 Amp
• Temperature Range: 60–80°C
• Mounting Type: Surface Mount
• Reset Function: Manual Reset Included
• Condition: Brand New OEM

🔄 Alternate / Cross Reference Part Numbers

This thermostat replaces:

• ST12-80
• ST12-80KS
• ST1205
• ST1205113
• EWT1L2-80K
• W1M2/80
• 6060606
• W1M2-80
• ST1204133
• ST12-80RS
• ST1205134
• 1317214
• 20431-3
• W1M25034K
• EWT1L2-508

If your existing thermostat matches any of the above numbers, this is the correct replacement.

✅ Compatible Brands

• Rheem
• Dux
• Aquamax
• Rinnai
• Apricus
• Other electric storage systems using ST12-80 configuration

If unsure, send your hot water system model and we’ll confirm compatibility before purchase.

🔥 What This Thermostat Does

• Regulates water temperature up to 80°C
• Cuts power once set temperature is reached
• Includes safety reset protection
• Helps prevent overheating
• Maintains consistent hot water supply

⚠️ Common Fault Symptoms

• Water not heating
• Water overheating
• System tripping
• Inconsistent temperature
• Thermostat not resetting

🛠 Installation Information

⚠️ Installation must be carried out by a licensed electrician.

Basic Installation Steps:

1. Isolate power at the switchboard.
2. Confirm system is not live.
3. Remove access cover and insulation.
4. Disconnect faulty thermostat wiring.
5. Mount new ST12-80 surface thermostat securely.
6. Reconnect wiring to correct terminals.
7. Reinstall insulation and cover.
8. Restore power and test operation.

Ensure thermostat probe or sensing plate is correctly positioned for accurate reading.

🔎 ST12-80 vs ST12-70 – Important Difference

ST12-70 → 70°C maximum

ST12-80 → 80°C maximum

Always match the temperature rating printed on your existing thermostat before ordering.

📦 Package Includes

1 × Genuine Robertshaw ST12-80 Thermostat (30A, Reset)

Why Choose Genuine Robertshaw?

✔ Trusted OEM manufacturer
✔ Used by major hot water brands
✔ Long service life
✔ Accurate and reliable temperature control

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