71R2250 Red Dot Rotary Thermostat with 36 in. Capillary (Variable Control)

The Red Dot 71R2250 Rotary Thermostat is a variable-control mechanical thermostat designed to maintain stable temperature regulation in mobile HVAC and heavy-duty vehicle systems. Equipped with a 36-inch capillary tube, this thermostat delivers responsive sensing and smooth cycling across a 34°F to 52°F operating range.

The rotary adjustment allows easy setpoint control, while a 5°F clutch cycle range helps prevent short cycling and supports consistent system performance. The 71R2250 is widely used across heavy-duty trucks, off-highway equipment, and fleet HVAC applications, making it a versatile replacement option.

• Part Type: Rotary Variable Thermostat

• Control Type: Rotary

• Type: Variable

• Red Dot Part No.: 71R2250

• Red Dot Factory No.: RD-4125-36P

• Capillary Length: 36″

• Temperature Range: 34°F – 52°F

• Clutch Cycle Range: 5°F

• Note: RD-4125-36P

Features & Benefits

• Variable rotary control for precise temperature adjustment

• 36″ capillary tube for flexible installation and accurate sensing

• 5°F clutch cycle range helps maintain stable operation

• Mechanical design for reliable performance in mobile environments

• Broad cross-reference coverage across truck and equipment platforms

Cross Reference Numbers

Texas Truck A/C: 850-9230, 850-9230A
AirSource / MEI: 1336
Alliance: ABP N83 323048, ABP N83 323058, ABP N83 323118, ABP N83 323188
Allis Chalmers: 1162474-9
AP Air: 210-913
Bergstrom: 650648, 650654, 651139, 651390
Case IH: 168902-C1, 175575-C91, F43646
Caterpillar: 2P-4338, 8P-5346, 8P-5349
Climatech: BD1015, BD1330, BD1460, BE1015
TRP / Climatech: BD10150, BE10150
CoolCab: 901261
CoolStar / MEI: 932-1216
Delco: 15-5184
Deutz-Allis: 003-4221, 003-4619, 70272229
DTAC: 03-14002
Eaton: 9533N422
Euclid: E-807008
Fiat-Allis: 1162474, 268476, 71162474
Fleetrite: ZGG11048
Ford New Holland: 271474
Four Seasons: 35845
Freightliner: 9533N178, A22-15817A-001, MVA1-1048, RNCA10658100
JBAR: 402284
John Deere: AR49960, AR59779
Kysor: 2399004, 2399020 (Old: 404028)
Mack: 2790-HV27072, 7979-404028
Motivair: 1-1047, 1-1445, 1-1842, 1-1844, 18629, 44590
Murray: 207501
Navistar: 175575-C1, 301305-C91, 446994-C1
Omega: 32-10902, 32-10902-E, 32-R2250
PACCAR: 1-1844Q
Primatech: PTAC1336
Red Dot (Aftermarket): 71R2250
Red Dot (Factory): RD-4125-36P
Roadforce: RF123B404218, RF429B404112
Truck Air / MEI: 27699, 28065
TruckAC+: T6723
TTA/C: 13-4404
Versatile: 53620
Volvo: 176272, 176275, 176276
Western Star: 61018-5005, A22-15817-A

Interchange Numbers

003-4221, 003-4619, 026476-9, 03-14002, 1-1844, 1-2629, 11-3076, 111051, 1162474, 1162474-9, 1336, 1392636, 168902C1, 1697525, 175575C1, 175575C91, 176272, 176275, 176276, 207501, 232-8417, 2399004, 268476, 271474, 279-2083, 2790HV27072, 2P4338, 301305C91, 32-10902-E, 34221, 34619, 35845, 404028, 404171, 405098, 4379-RD412536, 4379-RD412536P, 446994C1, 61018-5005, 650648, 650654, 651390, 6T9395, 70272229, 715902C1, 71R2250, 7979-404028, 842948900, 850-9230, 8P-5346, 8P-5349, 9054582, 925618, 925620, 932-1216, 9533N178, 9533N397, 9533N419, 9533N420, 9533N422, 9P3498, A10-6557, A22-15817A-001, A42609, A43186, A63865, ABP N83 323048, ABP N83 323058, ABP N83 323118, ABP N83 323188, AM81002, AM81006, AR49960, AR59779, BA13450, BD10150, BD13300, BD14600, BE10150, D4ZZ-19618-B, E-807008, F43646, L73646, RDHRD412536P, RDT71R2250, RNCA10-6581-00, SWI4516, VE2057, ZGG11048, ZGG11844