Thermostatic Switch for 1984-1985 Honda Civic & More - Four Seasons 35857

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$37.99
MPN: 35857
Item Package Quantity: 1
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Four Seasons A/C Clutch Cycle Switch,Thermostatic Switch P/N:35857
Four Seasons A/C Clutch Cycle Switch,Thermostatic Switch P/N:35857
$37.99

Keep the compressor cycling on cue and help protect the evaporator from freeze-up with the Four Seasons A/C Clutch Cycle Switch / Thermostatic Switch, MPN 35857. This system-mounted, preset cycling temperature switch senses temperature and signals the A/C compressor clutch to engage and disengage, regulating cooling and helping prevent evaporator icing. It drops in as a direct-fit replacement for a wide range of listed applications, including the 1978-1982 Ford Bronco, 1973-1982 Ford F-100, 1975-1982 Ford F-150, 1986-1995 Ford Taurus, 1984-1985 Honda Civic, 1979-1986 Mercury Grand Marquis, and many Freightliner models such as the 1996-2010 Century Class and 1990-2010 FLD120 — see the Buyer's Guide tab for the full 50-application list.

  • OE-style connectors: plug into the factory harness for a clean hook-up.
  • Quality contacts: engineered to ensure proper conductivity for reliable switching.
  • Includes sealing hardware: contains gaskets, o-rings, or seals to properly replace the product.
  • Precision engineered: tested and backed by Four Seasons' decades of mobile A/C experience.

Signs the original switch may need replacing include an A/C compressor that won't cycle, runs continuously, or a system that freezes over. If a failed cycling switch is the cause, this replaces it — diagnose the system to confirm before installing.

Frequently Asked Questions

What does this switch do?

It's a preset cycling temperature switch that senses temperature and signals the A/C compressor clutch to engage and disengage, regulating cooling and helping prevent evaporator freeze-up.

Does it come with seals?

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

Will it plug into my factory harness?

It uses OE-style connectors designed to plug into the factory harness for a clean, direct hook-up on the listed applications.

How do I know my switch is bad?

Signs include an A/C compressor that won't cycle, runs continuously, or an evaporator that freezes over. Diagnose the system to confirm the switch is the cause before replacing.

Does this fit my vehicle?

It fits 50 listed applications across Ford, Mercury, Honda, Autocar, and Freightliner. Check the Buyer's Guide tab to confirm your exact year, make, and model.