Daikin-McQuay 403585101 Pressure Switch
The Daikin-McQuay 403585101 Low Pressure Switch is an essential OEM safety component designed to maintain system integrity by monitoring refrigerant levels and preventing compressor operation during loss of charge or restricted airflow conditions. Specifically engineered for Daikin and McQuay HVACR units, this low pressure cutout switch (LPCO) features a factory-set 21 PSIG open (cut-out) and 50 PSIG close (cut-in/auto-reset) parameter. By integrating this HVAC pressure switch into the control circuit, technicians ensure that the system avoids the vacuum conditions and overheating often associated with low suction pressure. Weighing just 0.07 lbs, this compact refrigerant pressure switch is a direct OEM replacement part, ensuring standardized fitment and factory-grade reliability for commercial HVAC maintenance. In the field, its primary role is to verify the low-side suction line pressure before allowing the compressor contactor to engage, protecting the scroll or reciprocating compressor from permanent mechanical failure caused by lubricant starvation or high compression ratios.
Key Benefits for Technicians:- Precise Pressure Calibration: Pre-configured with a 21/50 PSIG range to align with Daikin-McQuay factory safety standards.
- Enhanced System Protection: Prevents compressor damage during low-refrigerant or coil-freeze scenarios by interrupting the 24V control signal.
- OEM Compatibility: Exact replacement for part number 403585101, eliminating mounting or electrical connection issues common with generic "universal" switches.
- Durable Construction: Built to withstand commercial refrigeration environments and the vibration of high-capacity condenser sections.
- How do I diagnose a faulty 403585101 switch? Use a multimeter to check for continuity across terminals. If the suction pressure is above 50 PSIG and the switch remains open (no continuity), the internal diaphragm or electrical contacts have likely failed.
- Can this switch be manually adjusted in the field? No, this is a fixed, non-adjustable control. If the trip points drift from the 21/50 PSIG factory specifications, the unit must be replaced to ensure system safety.
- Does an open switch always mean the part is bad? No. An open switch often indicates an actual low-pressure condition, such as a leak, a clogged filter drier, or restricted airflow across the evaporator. Always verify actual system pressures with gauges before condemning the switch.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Daikin-McQuay 403585101 Pressure Switch
The Daikin-McQuay 403585101 Low Pressure Switch is an essential OEM safety component designed to maintain system integrity by monitoring refrigerant levels and preventing compressor operation during loss of charge or restricted airflow conditions. Specifically engineered for Daikin and McQuay HVACR units, this low pressure cutout switch (LPCO) features a factory-set 21 PSIG open (cut-out) and 50 PSIG close (cut-in/auto-reset) parameter. By integrating this HVAC pressure switch into the control circuit, technicians ensure that the system avoids the vacuum conditions and overheating often associated with low suction pressure. Weighing just 0.07 lbs, this compact refrigerant pressure switch is a direct OEM replacement part, ensuring standardized fitment and factory-grade reliability for commercial HVAC maintenance. In the field, its primary role is to verify the low-side suction line pressure before allowing the compressor contactor to engage, protecting the scroll or reciprocating compressor from permanent mechanical failure caused by lubricant starvation or high compression ratios.
Key Benefits for Technicians:- Precise Pressure Calibration: Pre-configured with a 21/50 PSIG range to align with Daikin-McQuay factory safety standards.
- Enhanced System Protection: Prevents compressor damage during low-refrigerant or coil-freeze scenarios by interrupting the 24V control signal.
- OEM Compatibility: Exact replacement for part number 403585101, eliminating mounting or electrical connection issues common with generic "universal" switches.
- Durable Construction: Built to withstand commercial refrigeration environments and the vibration of high-capacity condenser sections.
- How do I diagnose a faulty 403585101 switch? Use a multimeter to check for continuity across terminals. If the suction pressure is above 50 PSIG and the switch remains open (no continuity), the internal diaphragm or electrical contacts have likely failed.
- Can this switch be manually adjusted in the field? No, this is a fixed, non-adjustable control. If the trip points drift from the 21/50 PSIG factory specifications, the unit must be replaced to ensure system safety.
- Does an open switch always mean the part is bad? No. An open switch often indicates an actual low-pressure condition, such as a leak, a clogged filter drier, or restricted airflow across the evaporator. Always verify actual system pressures with gauges before condemning the switch.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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Description
The Daikin-McQuay 403585101 Low Pressure Switch is an essential OEM safety component designed to maintain system integrity by monitoring refrigerant levels and preventing compressor operation during loss of charge or restricted airflow conditions. Specifically engineered for Daikin and McQuay HVACR units, this low pressure cutout switch (LPCO) features a factory-set 21 PSIG open (cut-out) and 50 PSIG close (cut-in/auto-reset) parameter. By integrating this HVAC pressure switch into the control circuit, technicians ensure that the system avoids the vacuum conditions and overheating often associated with low suction pressure. Weighing just 0.07 lbs, this compact refrigerant pressure switch is a direct OEM replacement part, ensuring standardized fitment and factory-grade reliability for commercial HVAC maintenance. In the field, its primary role is to verify the low-side suction line pressure before allowing the compressor contactor to engage, protecting the scroll or reciprocating compressor from permanent mechanical failure caused by lubricant starvation or high compression ratios.
Key Benefits for Technicians:- Precise Pressure Calibration: Pre-configured with a 21/50 PSIG range to align with Daikin-McQuay factory safety standards.
- Enhanced System Protection: Prevents compressor damage during low-refrigerant or coil-freeze scenarios by interrupting the 24V control signal.
- OEM Compatibility: Exact replacement for part number 403585101, eliminating mounting or electrical connection issues common with generic "universal" switches.
- Durable Construction: Built to withstand commercial refrigeration environments and the vibration of high-capacity condenser sections.
- How do I diagnose a faulty 403585101 switch? Use a multimeter to check for continuity across terminals. If the suction pressure is above 50 PSIG and the switch remains open (no continuity), the internal diaphragm or electrical contacts have likely failed.
- Can this switch be manually adjusted in the field? No, this is a fixed, non-adjustable control. If the trip points drift from the 21/50 PSIG factory specifications, the unit must be replaced to ensure system safety.
- Does an open switch always mean the part is bad? No. An open switch often indicates an actual low-pressure condition, such as a leak, a clogged filter drier, or restricted airflow across the evaporator. Always verify actual system pressures with gauges before condemning the switch.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
