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Controls

Controls

The HVAC control board is essentially the brains of the heating, ventilation and air conditioning system. Mounted inside the air handler or furnace unit, this electronic circuit board contains a variety of components like microprocessors, transistors, relays, and transformers that work together to regulate and direct all the operations of the HVAC system. The control board runs programming that can turn the system on or off, manage air flow speeds through the blower, start and stop the blower fan, trigger heating or cooling modes, monitor safety switches, control defrost cycles in heat pumps, and more. The board also contains diagnostic LED lights that can flash different error codes to assist HVAC technicians in quickly troubleshooting any issues.

HVAC control boards have evolved from using simple electromechanical technology to more advanced digital circuitry that offers higher precision, more efficiency, and added features. However, these boards are still prone to malfunction over time due to issues like electrical shorts, blown fuses, failed components, or general wear and tear. A faulty control board can lead to a variety of operation problems from no heating or cooling to inconsistent temperatures or a non-functioning unit. Only replacement with the exact OEM control board will properly restore system functioning. Upgrading to a newer control board model can also add improved capabilities to older HVAC equipment. Proper installation and wiring of the replacement board is critical for the system to operate safely and efficiently.

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  • RM7840L1018 Honeywell Programmer Control LHL-LF&HF Proven Purge RM7840L1018 Honeywell Programmer Control LHL-LF&HF Proven Purge

    RM7840L1018 Honeywell Programmer Control LHL-LF&HF Proven Purge

    Honeywell

    List Price: $2,618.23
    Price: $2,356.41
    Overview:Microprocessor-based integrated burner control for automatically fired gas, oil, coal or combination fuel single burner applications. Provides safety, functional capability and features beyond conventional controls.Features: Functions include...
    SKU:
    RM7840L1018
    List Price: $2,618.23
    Price: $2,356.41
    Qty in Cart: 0
    Price:
    List Price: $2,618.23
    Price: $2,356.41
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  • R7284B1024 Honeywell Universal Digital Electronic Oil Primary w/ Status Indicator Light R7284B1024 Honeywell Universal Digital Electronic Oil Primary w/ Status Indicator Light

    R7284B1024 Honeywell Universal Digital Electronic Oil Primary w/ Status Indicator Light

    Honeywell

    List Price: $78.52
    Price: $74.59
    The R7284 lets you keep track of system quality by accessing memory data that gives a clear picture of day-to-day performance. The error history capability defines when and how the controller encountered problems, and helps maintain knowledge when there...
    SKU:
    R7284B1024
    List Price: $78.52
    Price: $74.59
    Qty in Cart: 0
    Price:
    List Price: $78.52
    Price: $74.59
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  • VR8300A4508 Honeywell 3/4 x 3/4 inch Continuous Pilot Dual Automatic Gas Valve

    VR8300A4508 Honeywell 3/4 x 3/4 inch Continuous Pilot Dual Automatic Gas Valve

    Honeywell

    List Price: $164.41
    Price: $147.97
    Overview Combination gas control for use in 24 Vac gas-fired, standing pilot appliances with capacities from 30 to 300 cfh. Features   Control includes safety shutoff, manual valve, two automatic operators, pressure regulator...
    SKU:
    VR8300A4508
    List Price: $164.41
    Price: $147.97
    Qty in Cart: 0
    Price:
    List Price: $164.41
    Price: $147.97
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  • SV9541Q2561 Honeywell Two Stage Pilot Ignition Smart Valve

    SV9541Q2561 Honeywell Smart Gas Valve

    Honeywell

    List Price: $387.78
    Price: $349.00
    Description 1/2" NPT Smart Gas Valve - Slow Opening Opening Slow Body Pattern Straight-Through Voltage 24Vac; 50/60 Hz Ignition Trial Time 90 sec Prepurge 15 sec Inlet Size 1/2" Outlet...
    SKU:
    SV9541Q2561
    List Price: $387.78
    Price: $349.00
    Qty in Cart: 0
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    List Price: $387.78
    Price: $349.00
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  • S8910U3000 Honeywell Hot Surface Ignition Module S8910U3000 Honeywell Hot Surface Ignition Module

    S8910U3000 Honeywell/Resideo Hot Surface Ignition Module

    Honeywell

    List Price: $197.42
    Price: $120.00
    Universal hot surface ignition module replaces multiple field installed hot surface ignition modules supplied by Honeywell, White-Rodgers, Robertshaw and Johnson. Uses a 120 VAC igniter. Includes cross reference, instructions, and accessories for easy...
    SKU:
    S8910U3000
    List Price: $197.42
    Price: $120.00
    Qty in Cart: 0
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    List Price: $197.42
    Price: $120.00
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  • Q7800B1003 Honeywell SUB BASE METAL; WALL MOUNT; 2X K.O

    Q7800B1003 Honeywell SUB BASE METAL; WALL MOUNT; 2X K.O

    Honeywell

    List Price: $40.06
    Price: $36.05
    Overview:Burner, panel or wall mount subbases for 7800 SERIES relay modules and S7830A Expanded Annunciator.Features Makes electrical connections for 7800 SERIES relay modules or S7830A Expanded Annunciator through bifurcated contacts. Provides...
    SKU:
    Q7800B1003
    List Price: $40.06
    Price: $36.05
    Qty in Cart: 0
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    List Price: $40.06
    Price: $36.05
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  • ST7800A1138 Honeywell Purge Timer, 22 minutes

    ST7800A1138 Honeywell Purge Timer, 22 minutes

    Honeywell

    List Price: $75.00
    Price: $65.00
    Description Provides the pre purge timing for select 7800 SERIES relay modules. Pre-purge   22 minutes Get the Manual Click here to download
    SKU:
    ST7800A1138
    List Price: $75.00
    Price: $65.00
    Qty in Cart: 0
    Price:
    List Price: $75.00
    Price: $65.00
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  • ST7800A1120 Honeywell Purge Timer, 15 minutes

    ST7800A1120 Honeywell Purge Timer, 15 minutes

    Honeywell

    List Price: $144.70
    Price: $65.00
    Description Provides the pre purge timing for select 7800 SERIES relay modules. Pre-purge   15 minutes Get the Manual Click here to download
    SKU:
    ST7800A1120
    List Price: $144.70
    Price: $65.00
    Qty in Cart: 0
    Price:
    List Price: $144.70
    Price: $65.00
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  • ST7800A1112 Honeywell Purge Timer, 12 minutes

    ST7800A1112 Honeywell Purge Timer, 12 minutes

    Honeywell

    List Price: $104.58
    Price: $65.00
    Description Provides the pre purge timing for select 7800 SERIES relay modules. Pre-purge   12 minutes Get the Manual Click here to download
    SKU:
    ST7800A1112
    List Price: $104.58
    Price: $65.00
    Qty in Cart: 0
    Price:
    List Price: $104.58
    Price: $65.00
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  • ST7800A1096 Honeywell Purge Timer, 6 minutes

    ST7800A1096 Honeywell Purge Timer, 6 minutes

    Honeywell

    List Price: $95.00
    Price: $65.00
    Description Provides the pre purge timing for select 7800 SERIES relay modules. Pre-purge   6 minutes Get the Manual Click here to download
    SKU:
    ST7800A1096
    List Price: $95.00
    Price: $65.00
    Qty in Cart: 0
    Price:
    List Price: $95.00
    Price: $65.00
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  • ST7800A1088 Honeywell Purge Timer, 4 minutes

    ST7800A1088 Honeywell Purge Timer, 4 minutes

    Honeywell

    List Price: $95.00
    Price: $65.00
    Description Provides the pre purge timing for select 7800 SERIES relay modules. Pre-purge   4 minutes Get the Manual Click here to download
    SKU:
    ST7800A1088
    List Price: $95.00
    Price: $65.00
    Qty in Cart: 0
    Price:
    List Price: $95.00
    Price: $65.00
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  • ST7800A1070 Honeywell Purge Timer, 2.5 minutes

    ST7800A1070 Honeywell Purge Timer, 2.5 minutes

    Honeywell

    List Price: $95.00
    Price: $65.00
    Description Provides the pre purge timing for select 7800 SERIES relay modules. Pre-purge   2.5 minutes Get the Manual Click here to download
    SKU:
    ST7800A1070
    List Price: $95.00
    Price: $65.00
    Qty in Cart: 0
    Price:
    List Price: $95.00
    Price: $65.00
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