Whale Heater Expanse PCB Gas Main 782.129 - AK1911

Whale Heater Expanse PCB Gas Main 782.129 – AK1911

The Whale Expanse PCB Gas Main 782.129 (AK1911) is a genuine OEM replacement printed circuit board designed for Whale Expanse gas-only water heaters installed in caravans and motorhomes.

This main control PCB manages the heater’s gas ignition sequence, flame monitoring, and safety shut-off systems. If your Whale Expanse heater is failing to ignite, locking out, or showing intermittent faults, replacing the main PCB can restore safe and reliable hot water operation.

Why Choose This Whale Expanse PCB?

• ✅ Genuine Whale OEM Part – Built to original manufacturer specifications

• 🔥 Controls Gas Ignition & Flame Monitoring – Ensures safe burner operation

• 🛠 Direct Replacement Fit – Designed specifically for compatible Expanse models

• 🚐 Ideal for Caravan & Motorhome Repairs

• 🔒 Maintains Safety Systems & Fault Protection

Using a genuine Whale PCB ensures correct communication with sensors, gas valves, and safety circuits — reducing the risk of repeat faults.

Heater Compatibility

This PCB is compatible with selected Whale Expanse Gas-Only models, including:

⚠️ Always confirm your heater model and existing PCB part number before ordering.

Technical Specifications

• Brand: Whale

• Part Number: AK1911

• Whale Reference: 782.129

• Type: Main Gas Control PCB

• Application: Whale Expanse Gas-Only Water Heaters

• Installation: Professional installation recommended

Common Fault Symptoms This PCB May Fix

• Heater ignition failure

• Repeated lockout faults

• No burner flame detection

• Heater powers on but no hot water

• Intermittent operation

If your heater shows persistent gas-related errors, the main PCB may require replacement.

Why Buy This PCB?

• ✔ Genuine OEM quality – not aftermarket

• ✔ Designed specifically for Whale Expanse gas heaters

• ✔ Restores full ignition and safety functionality

• ✔ Ideal for caravan, motorhome & camper hot water systems

• ✔ Trusted replacement for long-term reliability

When replacing a critical component like a gas heater PCB, using the correct genuine Whale part ensures safe operation and dependable performance.