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SKU:
NLT2T04755
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105°C Water Temperature Alarm Switch for FG Wilson Gensets – 622-337
$31.29
In Stock
$31.29
Sale price
$31.29
Regular price
This 105°C water-temperature alarm switch fits compatible FG Wilson generator sets using part number 622-337 and a 3/8 NPT connection.
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Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
Applications are grouped below. Equipment can vary by serial number, engine, and production configuration.
| FG Wilson Gensets | Compatible generator sets calling for 622-337 |
| Perkins Engine Applications | Selected 1103, 1104 and 1106-powered generator configurations using the matching switch |
Product Overview
This cooling-system sensor/switch monitors engine temperature so the gauge, alarm circuit, or control system can respond when coolant temperature rises. A failed unit can produce a dead or inaccurate indication even when the cooling system itself is operating normally.
Parts listings identify 622-337 as a coolant-temperature alarm switch set around 105°C, with VDO reference 803/1/59 and use on generator sets powered by selected Perkins 1103, 1104 and 1106 engines. This is a warning switch, not simply a variable gauge sender.
Key Features & Performance
- Cooling-system monitoring: Restores the temperature-sensing point used by the machine's gauge or warning circuit.
- Threaded service replacement: Installs at the corresponding coolant passage when thread size and terminal configuration match.
- Diagnosis-friendly repair: Useful after wiring, connector condition, coolant level, and actual engine temperature have been checked.
Part Numbers & Specifications
- Part Number: 622-337
- Switch Temperature: 105°C
- Thread: 3/8 NPT
- VDO Reference: 803/1/59
- Electrical Range Reference: 6–24V / 3W as cataloged
Before You Order
Confirm 622-337, thread size, terminal style and whether the machine requires an alarm switch versus a variable temperature sender. Do not interchange the two functions solely by appearance.
Frequently Asked Questions
Is this an OEM part?
This is a replacement service part intended to interchange with the reference number(s) and applications listed here. It is not represented as a factory-branded OEM part unless the product packaging itself states otherwise.
How do I confirm fitment?
Match the original part number first, then confirm the machine model, engine, connector or mounting arrangement, and any serial-number break that applies to your equipment.