Wacker Neuson 5200012170 Relay 12Vdc 70A Intake Heater

The Wacker Neuson is a genuine OEM Relay 12Vdc 70A Intake Heater designed for the LTW20Z1, LTW20Z3, G70, G150, and G180 series light towers and portable generators. As a direct OEM replacement, part is sourced and validated to the same specifications as the original component installed at the factory. It is compatible across a broad range of configurations including Cold Weather, Tier 4i, extended run, and skidded variants. When your existing relay degrades or fails, swapping in this genuine Wacker Neuson part restores correct cold-start intake heating operation and protects against hard-start or no-start conditions in low-temperature environments.

Key Features

• Correct 12V / 70A Electrical Rating — matched to the intake heater circuit's current draw, ensuring the relay switches cleanly without undersized contacts that arc, weld, or drop voltage under load.
• Genuine OEM Component — sourced directly from Wacker Neuson, carrying the same part validation as the original relay fitted to these machines at the point of manufacture.
• Broad Series Compatibility — fits LTW20Z1, LTW20Z1-V S, LTW20Z3-V S light towers and G70, G150, and G180 portable generators across Standard, Cold Weather, Tier 3, and Tier 4i configurations.
• Cold-Start System Integrity — the intake heater relay is a critical component of the cold-weather starting circuit; a failed relay prevents the intake heater from energizing, leading to hard starts, excessive cranking, and accelerated engine wear in low temperatures.
• Direct Drop-In Installation — reuses the existing relay socket and wiring harness connector, so replacement requires no splicing or circuit modification.
• Electrical Safety Compliance — rated contacts prevent uncontrolled current flow to the intake heater element, protecting the circuit from overload conditions that could damage wiring or trigger fault shutdowns.

The intake heater relay acts as the high-current switching gate between the machine's 12V control circuit and the intake air heater element. When the engine control system calls for preheat — typically during cold-weather starting — a low-amperage signal energizes the relay coil, which closes the 70A contacts and sends full current to the heater element to warm incoming air before cranking. Without a functioning relay, the heater element receives no power regardless of ambient temperature, leaving the engine to start on cold, dense air alone. Over time, relay contacts can burn, corrode, or weld closed, causing intermittent or complete loss of preheat function — or, in the case of contacts welded shut, a heater element that stays energized and may overheat.

Part Details

Compatibility & Fitment

Verify Before You Order

Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.

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