The Wacker Neuson Thermal Switch is a genuine OEM component designed for the PS2-3703, PS3-3703, and PS4-3703 series submersible pumps. As a direct OEM replacement, this switch is built to the same specification as the original factory part, ensuring correct trip thresholds and reliable integration with the pump's motor protection circuit. Wacker Neuson's PS series spans 2-inch, 3-inch, and 4-inch discharge configurations across a range of voltages and horsepower ratings, and the is verified to cover multiple variants within that lineup. Keep part number on hand as a service spare to minimize unplanned pump downtime on the job.
Key Features
- Calibrated Trip Threshold — Engineered to open at the correct motor temperature, protecting the submersible motor from heat-related damage without nuisance tripping under normal load.
- Genuine OEM Component — Sourced directly from Wacker Neuson, this switch matches the original electrical specification for correct resistance and switching behavior within the motor protection circuit.
- Broad PS Series Coverage — Fits PS2-3703, PS3-3703, and PS4-3703 models across multiple voltage configurations, including 220V and 440V variants at 60Hz.
- Drop-In Replacement — Connects directly to the existing motor wiring harness using the original mounting position, requiring no circuit modifications.
- Motor Protection Compliance — A correctly functioning thermal switch is critical to safe submersible pump operation; a failed switch can allow the motor to overheat, risking winding damage or motor burnout.
A thermal switch is a temperature-sensitive safety device integrated into the submersible pump motor circuit. Its job is to monitor motor winding temperature and automatically interrupt the electrical circuit if the motor overheats — for example, during a dry-run condition, a blocked intake, or sustained overload. Once the motor cools to a safe operating temperature, the switch resets and allows the pump to resume normal operation. When a thermal switch fails in the open position, the pump will not run at all; if it fails closed, the motor loses its overheat protection entirely, leaving the motor vulnerable to permanent winding damage. Replacing a worn or failed thermal switch promptly is one of the simplest ways to protect the investment in a submersible pump motor.
Part Details
| Part Number | 5000162527 |
|---|---|
| Old Part Number | 0162527 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Thermal Switch |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| PS2-3703 | PS23703 | 5000008826, 5000008827, 5000009133 |
| PS3-3703 | PS33703 | 5000008832, 5000008833, 5000009136 |
| PS4-3703 | PS43703 | 5000008839, 5000008838, 5000009139 |
| PS3 2203 Sub. Pump, 220V/60hz, 3hp, 9.3A | PS32203 | 5000009129 |
| 50mm/2in Submersible Pump 220V /60Hz | PS22203 | 5000009126 |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
