HVAC Pressure Switches

Refrigerant pressure switches open the control circuit when system pressure moves outside its set range — the compressor's protection against a blocked high side, a lost charge or a dead condenser fan. Open and close setpoints are listed on every switch that states them: low pressure from 5/20 up to 40/80 PSI, high pressure from 350/250 to 600/475 PSI, fan cycling from 150/225 to 210/275 PSI, and a 410 PSI manual reset.

Also here: adjustable air pressure switches covering .25 to 1.0 in. and 1.0 to 4.0 in. water column, a furnace vent switch, and a Johnson Controls electronic control with a field-selectable 0 to 750 PSI range and an SPDT relay. Most of the refrigerant switches are SPST, encapsulated and non-adjustable on a 1/4 in. female SAE direct mount — which makes the setpoint pair the whole decision. Match open and close to the equipment, not just to the part that came out.

HVAC Pressure Switches

Factory Authorized Parts Pressure Switch 1192931

Non-Branded Pressure Switch 1192932

MARS Pressure Switch SPST Normally Closed Open on Rise 300-400 PSI 43331

Supco Pressure Switch 325-425 PSI SHP425325

MARS Pressure Switch SPST Normally Open 43348

ESP Pressure Switch Air Adjustable .25" to 1.0" WC RSS-495-11

Non-Branded Pressure Switch Vent 1191553

ESP Pressure Switch Air Adjustable 1.0" to 4.0" WC RSS-498-13

Johnson Controls Pressure Switch Electronic SPDT 0-750 PSI with Display P470EB-1C

MARS Pressure Switch SPST Normally Open 43347

ESP Pressure Switch Universal Air NS2-0000-03

TRADEPRO® Pressure Switch High Pressure Open 375 Close 265 PSI SPST TP-HP375265

MARS Pressure Switch SPST Normally Open 10-25 PSI 43343

TRADEPRO® Pressure Switch Low Pressure Open 25 Close 80 PSI SPST TP-LP2580

TRADEPRO® Pressure Switch Low Pressure Open 25 Close 65 PSI SPST TP-LP2565

TRADEPRO® Pressure Switch Fan Cycling Open 150 Close 225 PSI SPST TP-FC150225

TRADEPRO® Pressure Switch High Pressure Manual Reset Open 410 PSI SPST TP-MR410

TRADEPRO® Pressure Switch Low Pressure Open 40 Close 80 PSI SPST TP-LP4080

TRADEPRO® Pressure Switch Low Pressure Open 15 Close 35 PSI SPST TP-LP1535

TRADEPRO® Pressure Switch High Pressure Open 350 Close 250 PSI SPST TP-HP350250

TRADEPRO® Pressure Switch Low Pressure Open 25 Close 50 PSI SPST TP-LP2550

TRADEPRO® Pressure Switch Fan Cycling Open 170 Close 250 PSI SPST TP-FC170250

TRADEPRO® Pressure Switch High Pressure Open 425 Close 300 PSI SPST TP-HP425300

TRADEPRO® Pressure Switch Low Pressure Open 10 Close 25 PSI SPST TP-LP1025

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