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Electro-Mechanical Thermostats by Honeywell®
Honeywell's Most Basic Thermostats
Vertical Mount Series.
T834L electro-mechanical thermostats by Honeywell®
For low voltage control of single-stage heating, cooling, or heating-cooling systems.

* Coiled bi-metal element operates mercury switch
* T834Cs mount vertically
* T8034Cs mount horizontally
* Five year warranty.

Part Number Description Price each
T834C1137 Standard Heat/Cool, Beige, Terminals R,W,Y,G
1heat/1cool Gas, Oil, Electric, H/O/C A/O switches, vertical mount. While supplies last. **** OBSOLETE REPLACE WITH T834N1002 (See below ↓) OR TH1110D1000 ****
$48.89
HONT834C2473 Heat Pump(1 Stage, 1 Transformer), Taupe, Terminals R,W,Y,G,O,B,1,2
1heat/1cool Gas, Oil, Electric, H/O/C A/O switches, Vertical Mount.
Buy 10 or more $34.68
$37.68
T834C2499 Standard Heat/Cool, White, Terminals R,W,Y,G,O,B,1,2,
1heat/1cool Gas, Oil, Electric, H/O/C A/O switches, Vertical Mount. While supplies last. *** OBSOLETE *** REPLACED BY T834N1002. See below ↓
$44.02
HONT834N1002
1heat/1cool Gas, Oil, Electric, H/O/C A/O switches, Vertical Mount.
R, RC, W, Y, G, O, B
Buy 10 or more $34.68
$37.16
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HONT410A1013
Electric Baseboard Heat Thermostats
T410a electro-mechanical Electric Baseboard Thermostat¹

120/208/240V SPST BIMETAL ELECTRIC HEAT THERMOSTAT 40-80°F
Buy 4 or more $19.88
$20.86
HONT410B1004 120/208/240V SPST BIMETAL ELECTRIC HEAT THERMOSTAT 40-80°F
Buy 4 or more $20.06
$20.78
HONT4398A1021
Premier White High Performance Electric Heat Thermostat for Electric Baseboard Heat
T4398a electro-mechanical Electric Baseboard Thermostat¹
120/208/240V SPST DIAPHRAGM ELECTRIC HEAT THERMOSTAT IN WHITE 50-80°F INCLUDES RANGE STOPS & LOCKING COVER SCREWS
Buy 4 or more $28.11
$29.36
HONT4398B1029 120/208/240V DPST DIAPHRAGM ELECTRIC HEAT THERMOSTAT IN WHITE 50-80°F INCLUDES POSITIVE OFF, RANGE STOPS, & LOCKING COVER SCREWS
Buy 4 or more $35.91
$36.72
HONT451A3005
Thermostat, Medium Duty Line Voltage
T451a electro-mechanical Electric Baseboard Thermostat¹
120/240/277V LIGHT DUTY LINE VOLT HEAT THERMOSTAT 40-90°F INCLUDES THERMOMETER, RANGE STOPS, & LOCKING COVER
Buy 4 or more $53.33
$57.65
HONT451B3004 LINE VOLT 120 Vac - 227 Vac HEAT STAT 50-86°F W/POSITIVE OFF LESS THERMOMETER REPLACES T451A2015 & T451A2049
Buy 4 or more $57.05
$61.67
HONT498A1778
White Heat Thermostat for Electric Baseboard Heat
T498a electro-mechanical Electric Baseboard Thermostat¹
120/208/240V SPST ELECTRIC HEAT THERMOSTAT 40-80°F
Buy 10 or more $32.60
$33.76
HONT498A1810 Brush Gold Electric Heat Thermostat for Electric Baseboard Heat 120/208/240V SPST ELECTRIC HEAT STAT LESS THERMOMETER
Buy 10 or more $30.56
$31.64
HONT498B1512 Brush Gold Electric Heat Thermostat for Electric Baseboard Heat 120/208/240V SPST ELECTRIC HEAT STAT LESS THERMOMETER
Buy 10 or more $39.45
$40.33
HONT498B1553 Brush Gold Electric Heat Thermostat for Electric Baseboard Heat120/208/240V DPST ELECTRIC HEAT THERMOSTAT LESS THERMOMETER, WITH POSITIVE OFF 40-80°F
Buy 10 or more $31.89
$32.73
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Horizontal Mount Series
T8034 electro-mechanical thermostats by Honeywell®¹

For low voltage control of single-stage heating, cooling, or heating-cooling systems.

* Coiled bi-metal element operates mercury switch
* T834Cs mount vertically
* T8034Cs mount horizontally
* Five year warranty.

Model Name Price
T8034C1085 OBSOLETE: Replace with T8034N1007. Standard Heat/Cool, Independent Circuit, Beige, Terminals RC,RH,W,Y,G
1heat/1cool Gas, Oil, Electric, H/O/C A/O switches, horizontal mount
* This product is obsolete. It can be purchased while supply lasts, or you can look for a replacement in the cross-reference.
$49.59
HONT8034N1007 Bimetal Mercury Free 1Heat/1Cool Stage Thermostat for control of single stage low voltage heating/cooling systems. Terminal Designations R, RC, W, Y, G, O, B. $37.42
T8034C1424 Heat pump (1 stage, 1 transformer), Heat/Cool, Taupe, Terminals R,W,Y,G,O,B,1,2
1heat/1cool Gas, Oil, Electric, H/O/C A/O switches, horizontal mount
$50.63
HONT8034C1481 Three Wire Heat/Cool, Conventional and Heat Pump systems, White, Terminals R,W,Y,G,O,B,1,2
1heat/1cool Gas, Oil, Electric, H/O/C A/O switches, horizontal mount
$35.18
HONT841A1506 24V PREMIER WHITE MULTI-STAGE HEATPUMP THERMOSTAT W/EMERGENCY HEAT.
Obsolete: while supplies last.
$45.69
HONT841A1563 24V MULTI-STAGE HEATPUMP THERMOSTAT FOR NEW CONSTRUCTION, NO THERMOMETER
Obsolete: while supplies last.
$53.04
HONT841B1000 24V HEAT PUMP THERMOSTAT 2-STAGE HEAT 1-STAGE COOL WITH SPERATE Y & W1 TERMINALS FOR COMPRESSOR
Obsolete: while supplies last.
$28.95
HONT841E1007 PREMIER WHITE 24V 2 STAGE GAS VALVE THERMOSTAT 2H-1C WITH MANUAL CHANGEOVER REPLACES TRANE TAYSTAT 241
Obsolete: while supplies last.
$63.57
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HONT6051A1016
Thermostat, Heavy Duty Line Voltage 120/240V
pic of t6051a Thermostat, Heavy Duty Line Voltage¹
Application: Heating and cooling, FOR VERTICAL OR HORIZONTAL MOUNTING. Use with: Q651A, B subbases for system and fan switching. Heavy Duty Line Voltage Thermostats are used to control fan coils, fans, motor starters, valves, contactors, and circulator motors in heating and/or cooling systems. REPLACES T4051A,B T473A1003, TA42A13X
1 $96.32
HONT6052A1015 Thermostat, Heavy Duty Line Voltage 120/240V, Application: Two stage heating or two stage cooling, Use with: Q651A, B subbases for system and fan switching. FOR VERTICAL OR HORIZONTAL MOUNTING. 1 $135.86
HONT6052A1023 Thermostat, Heavy Duty Line Voltage, Application: Two stage heating or two stage cooling, Use with: Q651C subbase for system and fan switching. Heavy Duty Line Voltage Thermostats used to control fan coils, fans, motor starters, valves, contactors, and circulator motors in heating and/or cooling systems. CELSIUS. FOR VERTICAL OR HORIZONTAL MOUNTING. 1 $152.62
HONT6052B1013 Thermostat, Heavy Duty Line Voltage, Application: Heating and cooling, auto changeover, Use with: Q651A, B subbases for system and fan switching. FOR VERTICAL OR HORIZONTAL MOUNTING. 1 $135.86
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HONT6054A1005
Return Air Temperature Controller
pic of t6054a Return Air Temperature Controller¹
T6054B and T6064A provide fast response with hydraulic temperature sensing elements mounted on the unit. -30°F to 110°F. Provides SPDT heavy-duty, line-voltage 120 Vac or 240 Vac temperature control in ventilation, heating or cooling systems.
1 $77.32
HONT6064B1001
DUAL BULB RETURN AIR THERMOSTAT
pic of t6064b DUAL BULB THERMOSTAT¹
Used with a standard room thermostat to limit room temperature control point on heating and cooling. Sensor design permits mounting of sensors in return air path in packaged air conditioning units. 120/240/277 Vac. 2 SPDT. OBS**Available while supplies last.
1 $103.73
 
HONT6069B4018
Fan Coil Thermostat, 2 or 4 pipe Manual Heat/Cool changeover
pic of t6069b Fan Coil Thermostat¹
Constant fan only, degree F; Supply voltage: 120 to 277 Vac 50/60 Hz. Control line voltage valves and/or blower motors on fan coil units in manual changeover heating/cooling systems. The thermostats feature a single System and Fan speed switch. TAN COLOR REPLACES T694D2009
1 $82.11
HONT6069B4018 Fan Coil Thermostat 44-86°F, 2 or 4 pipe Manual Heat/Cool changeover, Cycled fan only, degree F; Supply voltage:120 to 277 Vac 50/60 Hz 1 $82.11
HONT6069D4014 Fan Coil Thermostat, 2 pipe Remote Heat/Cool changeover, Constant or cycled fan, degree F; Supply voltage:120 to 277 Vac 50/60 Hz. 44-86°F WITH THERMOMETER. TAN COLOR 1 $74.85
HONT6169B4017 Thermostat, Medium Duty Line Voltage, Application: heating/cooling, Range: 44°F to 86°F. 2 OR 4 PIPE SYSTEMS. 1 $69.22
HONT6169C4015 Thermostat, Medium Duty Line Voltage, Application: heating/cooling, Range: 44°F to 86°F. 4 PIPE SYSTEMS 1 $69.22
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HONT631A1006
Thermostats, Farm-O-Stat, type: Agricultural Temperature Controller
pic of t631a Farm-O-Stat¹
Output: 1 SPDT. Provide line voltage control of heating, cooling and ventilating systems in farm buildings or storage areas. 35-100°F
1 $90.88
HONT631A1022 Thermostats, Farm-O-Stat, type: Agricultural Temperature Controller, Output: 1 SPDT. LINE VOLT 70-140°F 120 to 277 Vac 50/60 Hz. 1 $94.85
HONT631A1030 Thermostats, Farm-O-Stat, type: Agricultural Temperature Controller, Output:1 SPDT 120 to 277 Vac 50/60 Hz. 0 to 70°F. Red color. 1 $90.88
HONT631C1004 Thermostats, Farm-O-Stat, type: Agricultural Temperature Controller, Output:1 SPDT 120 to 277 Vac 50/60 Hz. -10 to 60°F 1 hp. OBS**Available while supplies last. Gray color. 1 $76.96
HONT631A1030 Thermostats, Farm-O-Stat, type: Agricultural Temperature Controller, Output: 1 SPDT (1 hp at 0.7 kW). 20°F to 90°F. Gray color. 1 $97.33
HONT631C1103 Thermostats, Farm-O-Stat, type: Agricultural Temperature Controller, Output: 1 SPDT (1 hp at 0.7 kW). -30°F to 100°F. Gray finish. 1 $97.33
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Electro-Mechanical Thermostats
Single and Multi-Stage
T874 Honeywell Thermostat¹
Adjustable heat anticipation.
CAN ONLY BE USED WITH Q674 SUBBASES (PURCHASED SEPARATELY)
Inclds screws and wrench for locking cover and adj locking levers.
Part Number Brand & details Color Minimum
Quantity
Price each
T874A1010 Single State 1Ht/1Cl, Non-adjustable Range Stops, Adjustable Locking Levers. Beige 1 $174.36
T874A1036 Single State 1Ht/1Cl, Adjustable Locking Levers. Beige 1 $174.42
HONT874A1150 Single Stage 1Ht/1Cl, Adjustable Locking Levers, Adjustable Range Stops. Beige 1 $173.73
T874A1176 Single Stage 1Ht/1Cl, DOD, Non-adjustable Range Stop, Adjustable Locking Levers. Beige 1 $172.43
T874B1019 Honeywell® Multistage 1Ht/2Cl, temp range 40-90°F. CLOSEOUT Beige 1 click here
T874C1018 Multistage 2Ht/1Cl, Adjustable Locking Levers. Beige 1 $174.13
T874D1165 Multistage 2Ht/2Cl, Adjustable Locking Levers, Adjustable Range Stops. Beige 1 $175.12
T874F1015 Multistage 2Ht, Adjustable Locking Levers. Beige 1 $178.23
T874G1246 Multistage 2Ht/1Cl, Heat Pump, Use w/Q674F1212,Q674F1410 only. Beige 1 $173.80
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Thermostat Subbases provide wiring terminals, mounting base, and system and fan switching for T874 Multistage Thermostats.
Subbase for Honeywell T784 Thermostats¹
All at reduced prices to sell
Model Description Color Min. Purchase Price
HONQ674A1019 Honeywell® Heat-Auto-Cool,Terminals W1,W2,G,RC,RH,Y2,Y1 for T874 A—D. Beige 1 $44.86
Q674B1018 Honeywell® Heat-Off-Cool model with terminals W1,W2,G,RC,RH,B,O,Y2,Y1. Fan Sw. Auto-On, with With isolated fan, For T874A-D Beige 1 $46.98
Q674B1034 Honeywell® Heat-Off-Cool model with terminals W1,W2,G,RC,RH,B,O,Y2,Y1. Fan Sw. On-Auto, For T874A-D Beige 1 $42.44
Q674B1075 Honeywell® System Sw: Heat-Off-Cool with terminals W1,W2,G,R,B,O,Y2,Y1 . Fan Sw. Auto-On, For T874A-D Electric Heat Applications Beige 1 $42.44
Q674B1216 Honeywell® OFF-HEAT-COOL, with terminals W1,W2,G,R,B,O,Y2,Y1,W3,T, Fan Sw. On-Auto, for T874W1015 only Beige 1 $42.44
Q674C1058 Honeywell® OFF—AUTO, Fan Sw. On-Auto,for T874 A–F Beige 1 $35.03
Q674D1040 Honeywell® NO System Switches, with terminals W1,W2,RC,RH,Y2,Y1, No Sw., For T874A-F Beige 1 $35.03
Q674E1049 Honeywell® OFF-HEAT-AUTO-COOL, Fan Sw. On-Auto, Terminals W1,W2,G,RC,RH,B,O,Y2,Y1, For T874A-D Beige 1 $47.21
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Q674G1070 Honeywell® OFF-AUTO, with terminals W1,W2,RC,RH,B,O,Y2,Y1, For T874A-F Beige 1 $39.34
Q674F1022 Honeywell® OFF-AUTO-HEAT-COOL-EM, Fan On-Auto, For T874 C, D Beige 1 $55.87
HONQ674L1207 Honeywell® EM.HT.-HEAT-OFF-COOL, with terminals W2,E,G,R,X,Y,L,W3,O,B, AUTO-ON Fan, For T874R1152 only Beige 1 $56.33