Description
Nothing ruins a long day in the cab like having your air conditioning quit when the temperature’s climbing and dust is flying. This dual-purpose pressure switch keeps your A/C system running safely by monitoring both the high and low sides of your refrigerant system. When pressure drops too low or climbs too high, it cuts power to protect your expensive compressor from damage that could leave you sweating through the rest of harvest season.
What You’re Getting
- Cuts out low side at 5 PSI to prevent compressor damage from refrigerant loss
- Cuts out high side at 380 PSI to protect against dangerous over-pressurization
- Direct replacement for John Deere conversion kits 990-403, 990-404, 990-405, and 990-406
- Gives you true protection on both sides of the system instead of just one
- Built to handle the vibration and temperature swings of cab-mounted A/C systems
Built for Real Farm Work
This switch is designed for John Deere tractors that have been converted to modern air conditioning systems using the 990 series conversion kits. These kits were popular retrofits for older tractors that didn’t come with factory A/C, giving operators the comfort they need during those long summer days in the field, whether you’re combining soybeans, cultivating corn, or running hay equipment.
Made to Last
Air conditioning pressure switches take a beating from constant pressure cycling, temperature extremes, and the rough conditions of farm work. This switch uses reliable internal contacts that won’t stick or burn out when the system cycles on and off. The housing is built to resist the heat and vibration that comes with being mounted near your engine compartment.
Good to Know
Installation involves splicing this switch into your A/C system’s electrical circuit – check your conversion kit instructions for the exact wiring diagram. If your A/C has been cutting out intermittently or won’t come on at all, this switch could be the culprit. A quick tip: if you’re losing refrigerant and the low-pressure side keeps kicking out, fix the leak first or you’ll just keep tripping the switch.
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