71R3100 Red Dot Fixed Setting Thermostat with 24 in. Capillary

The Red Dot 71R3100 Fixed Setting Thermostat is designed for applications where repeatable, consistent temperature control is required without operator adjustment. This non-adjustable (preset) thermostat is commonly used in mobile HVAC systems that rely on stable cycling rather than variable control.

It features a 24-inch capillary tube and operates within a 34°F–38°F temperature range, making it well suited for evaporator control in standard cooling applications. The 5°F clutch cycle range helps maintain steady compressor engagement while reducing short cycling. A flange-base mounting design with 2 1⁄8″ hole spacing supports straightforward installation in common HVAC housings.

• Part Type: Thermostat (Fixed Setting / Non-Adjustable)

• Red Dot Part No.: 71R3100

• Red Dot Factory No.: RD-4427-24P

• Mount Style: Flange Base Mount

• Mounting Hole Spacing: 2 1⁄8″

• Capillary Length: 24″

• Type: Fixed

• Temperature Range: 34°F – 38°F

• Clutch Cycle Range: 5°F

Features & Benefits

• Preset temperature control for consistent HVAC operation

• Fixed design eliminates accidental or unauthorized adjustment

• 34°F–38°F range optimized for evaporator cycling

• 5°F clutch differential helps prevent short cycling

• Flange-base mount supports common OEM installations

Cross Reference Numbers

Texas Truck A/C: 850-9180
AirSource / MEI: 1331
Alliance: ABP N83 323013, 323040, 323060, 323110
Bergstrom: 650616, 650652, 650878
Case IH: 404145
Climatech: BD1065, BD1070, BD1340
CoolCab: 901267, 901268
CoolStar / MEI: 932-1128
DTAC: 03-14006
Euclid: E-807003, E-807042
Four Seasons: 35706, 35823
GM: 3093422
Kysor: 2213012, 2314001, 2399005
Kysor (Old): 404438
Mack: 3230-221703, 3230-221707, 4379-RD442717, 4379-RD442724, 4379-RD553820
Motivair: 1-1072, 23377, 44566
Murray: 207510
Navistar: 1691739-C91
NDNS: 1691739C91, ABPN83323013, ABPN83323040, ABPN83323060, ABPN83323110
Omega: 32-10900, 32-20916
PACCAR: 589490BSM, A45-1054
Primatech: PTAC1331
Red Dot (Aftermarket): 71R3100, 71R3320
Red Dot (Factory): RD-4427-24P
Road Choice: SWI4428
Roadforce: RF8196508501, RF996504304
TRP / Climatech: BD10750, BD13400
Truck Air / MEI: 30987
TruckAC+: T6713
TTA/C: 13-4201
Volvo: 1110162, 1118408, 1118413, 176273, 3949284, 589490, 61018-5002, V1118408

Interchange Numbers

03-14006, 1-1072, 1-6564, 11-3084, 1110162, 1118408, 1331, 166428C1, 1691726C91, 1691739C91, 176273, 207518, 2314001, 232-8425, 2399005, 250-6803, 270-45, 3093422, 32-20916, 35706, 35823, 3916661, 3949284, 404097, 404145, 4379-RD442717P, 4379-RD442724, 4379-RD442724P, 4379-RD553820P, 4379-RD570150P, 61018-5002, 650476, 650878, 71R3100, 7787-650163, 850-9180, 925628, 932-1128, 9533N407, 9533N538, A10-2482, A45-1054, ABP N83 323040, ABP N83 323060, ABP N83 323110, ABP N83 323140, AM81011, AT196933, BD10650, BD10700, BD10750, BD13400, BSM650163, C6OZ-19618-A, E-807003, PB3537, RD4427-24, RD4427-24P, RDHRD442724P, RDT71R3100, SWI4428, V1118408, ZGG14605, ZGG16002