The Red Dot 71R3125 Preset Thermostatic Switch is a fixed (non-adjustable) thermostat designed for applications where consistent, repeatable temperature control is required. Because the setting is preset, it helps eliminate operator adjustment and ensures stable HVAC performance in demanding environments.
This thermostat features a 33-inch capillary tube and operates across a 40°F–85°F temperature range, making it well suited for Caterpillar and heavy-duty equipment applications. The 5°F clutch cycle range supports steady system cycling, while the flange base with optional side-mount capability allows flexible installation in common HVAC housings.
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Part Type: Thermostat (Preset / Fixed Setting)
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Red Dot Part No.: 71R3125
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Red Dot Factory Part No.: RD-5-8377-0P
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Type: Fixed (Non-Adjustable)
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Capillary Length: 33″
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Temperature Range: 40°F – 85°F
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Clutch Cycle Range: 5°F
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Mounting Hole Spacing: 2 3⁄16″
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Mount Style: Flange Base (optional side mount)
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Application: Caterpillar Applications
Features & Benefits
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Preset temperature control for repeatable HVAC performance
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Fixed design prevents unintended adjustment
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Wide 40°F–85°F range for equipment cooling control
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5°F clutch cycle helps stabilize compressor operation
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Flange base with optional side mount for installation flexibility
Cross Reference Numbers
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Alliance: ABP N83 323150
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Volvo: RDHRD583770P
Interchange Numbers
247-3578, 4379-RD583770P, 71R3125, ABP N83 323150, RDHRD583770P, RDT71R3125
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