Loyalty Program
HVAC control switches regulate fans, blowers, and heating functions. Replacing faulty switches ensures accurate system control, prevents overheating, and maintains reliable, efficient HVAC performance for consistent indoor comfort.
-10%Johnson Controls A70KA-1 Low & High Temperature Limit Control M/R 100°-170°F Open-High 6" CapillarySpecial Price $293.23 Regular Price $325.49
-13%Johnson Controls P170AA-118 Pressure Control Switch 100-400 PSI Open-LowSpecial Price $131.30 Regular Price $150.99
-13%Johnson Controls P20EB-2 SPDT A/C Limit Differential Pressure Control 100-425 PSI/76 PSISpecial Price $108.49 Regular Price $124.76
-13%Johnson Controls P170AA-400 SPST High-Pressure Cut-Out Control 1/4" Flow Switch Open-Low 100/470 PSISpecial Price $131.30 Regular Price $150.99
-10%Honeywell L4079B1041 High Pressuretrol Controller Manual Reset 10-150 PSI OpenSpecial Price $306.00 Regular Price $339.66
-13%- -13%Honeywell SP970A1005 3-Port Pneumatic Position Switch 10 PSISpecial Price $197.59 Regular Price $227.23
- -23%Supco SFC125265 Fan Cycle Switch 265 PSI Cut-In/125 PSI Cut-OutSpecial Price $23.13 Regular Price $30.07
- -13%Siemens QVE1900U 1.25" SPDT Liquid Flow Switch 15ASpecial Price $153.39 Regular Price $176.40Out of stock
- -13%Johnson Controls P70EA-14 12" Pressure Control 80 PSI 5-35 PSI Differential 36" CapillarySpecial Price $199.43 Regular Price $229.35Out of stock
- -10%Johnson Controls P170LB-6 Dual Pressure Control Switch 12" Capillary 80 PSI Low 100-425 PSI HighSpecial Price $237.99 Regular Price $264.16
- -13%Johnson Controls P170AB-12 Pressure Control Switch 12" HG To 80 PSI Open-LowSpecial Price $130.59 Regular Price $150.18Out of stock
HVAC Control Switch Replacement Components for Electrical Systems
HVAC control switch replacement parts are vital for reliable, precise, and safe operation in heating, ventilation, and air conditioning systems. They regulate electrical circuits that control essential functions such as fan operation, blower speed, and heating output for consistent performance.
Common HVAC control switches include fan switches, blower switches, heater switches, and limit control switches. These components ensure efficient system performance, maintain indoor comfort, and prevent malfunctions. They keep HVAC systems running safely in both residential and commercial settings.
A furnace limit control switch monitors internal temperatures and controls blower operation to prevent overheating and ensure proper airflow. Similarly, an HVAC blower control switch regulates blower motor activity, while an HVAC fan control switch manages fan cycling for efficient air distribution. An HVAC heater control switch controls heating functions, ensuring the system responds accurately to temperature demands.
Signs of failing switches include inconsistent airflow, fans not operating correctly, overheating, or system startup issues. Regular inspection and timely replacement help maintain efficient operation, protect system components, and ensure dependable heating and cooling performance in residential and commercial HVAC systems.
At PartsHnC, we offer pressure control DPST switches, differential pressure controls, air flowmeters, and SPDT air pressure sensing switch kits. Compatible with Cleveland Controls, Robertshaw, Dwyer Instruments, and Johnson Controls for precise and reliable HVAC performance.
FAQs
How do I know if a control switch is failing?
Signs include inconsistent fan or blower operation, heating issues, system not starting, or unusual noises from the HVAC unit.
Can a faulty HVAC control switch cause the system to overheat?
Yes, if a switch controlling the blower or heater fails, it can prevent proper airflow, leading to overheating and potential system damage.
How often should HVAC control switches be inspected?
Control switches should be checked during regular HVAC maintenance to ensure proper operation, prevent failures, and maintain system efficiency.
Can a bad blower control switch stop my HVAC system?
Yes, a faulty blower or fan control switch can prevent the system from circulating air, causing heating or cooling issues.
Are HVAC control switches difficult to replace?
Most switches are straightforward to replace with basic tools, but always follow safety precautions and power shutdown procedures.