Four Seasons HVAC Binary Switch 20891
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Four Seasons HVAC Binary Switch 20891
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Four Seasons HVAC Binary Switch P/N:20891

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$47.99
MPN: 20891
Item Package Quantity: 1
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Four Seasons HVAC Binary Switch P/N:20891
Four Seasons HVAC Binary Switch P/N:20891
$47.99

Keep your A/C compressor protected with the Four Seasons HVAC Binary Switch 20891, a system-mounted binary pressure switch that monitors refrigerant pressure and signals the compressor clutch to disengage when pressure falls too low or climbs too high. It installs as a direct-fit replacement on the 2004-2005 Ford E-350 Club Wagon, 2004-2007 Ford E-350 Super Duty, 2004-2007 Ford E-450 Super Duty, 2008-2010 Ford F-450 Super Duty, and 2000-2001 Jeep Cherokee — see the Buyer's Guide tab for engine-level fitment.

  • Zinc coated: the housing is zinc coated to resist corrosion.
  • Ready to install: contains gaskets, o-rings, or seals to properly replace the product.
  • Color coded: color coded for easy identification.
  • Application-specific: built for vehicle-specific applications and backed by Four Seasons' decades of mobile A/C experience.

If the original binary switch is the cause of an A/C compressor that won't engage, replacing it with this switch restores proper pressure-based clutch control. Signs the switch may need replacing include a compressor clutch that won't cycle or cuts out under load. Diagnose the A/C system to confirm the switch is the fault before replacing.

Interchange: 206985 · 5015792AA · 11120891 · 901283 · 4C2Z19D594AA · 1711516 · 1711655 · 1594 · A06985 · MT1199 · SW11175 · SW11175C

This part cross-references / interchanges with the following part numbers:

206985, 5015792AA, 20891, 11120891, 901283, 4C2Z19D594AA, 1711516, 1711655, 1594, A06985, MT1199, SW11175, SW11175C

Frequently Asked Questions

What does this binary switch do?

It monitors A/C refrigerant pressure and signals the compressor clutch to disengage when pressure is too low or too high, helping protect the system.

Which vehicles does the 20891 fit?

It fits the 2004-2005 Ford E-350 Club Wagon, 2004-2007 Ford E-350 and E-450 Super Duty, 2008-2010 Ford F-450 Super Duty, and 2000-2001 Jeep Cherokee. Check the Buyer's Guide tab.

Does it include seals?

Yes. It contains gaskets, o-rings, or seals to properly replace the product.

Is it corrosion resistant?

The housing is zinc coated to resist corrosion, and the switch is color coded for easy identification.

My compressor won't engage — will this fix it?

If a failed binary switch is the cause, replacing it restores proper pressure-based clutch control. Diagnose the A/C system first to confirm the switch is at fault.

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