Honda CRX silhouetteCRX

Test - Thermostat Switch / Relay

15-60prose procedure

Thermostat Switch

Dip the evaporator sensor into a pan filled with ice water, and check for continuity between the terminals.
Cut off
1.5 - -0.5°C (35-33°F)
Cut in
2.5-5°C (36-41°F)
If cut off or cut in temperature is too low or too high, replace the thermostat switch.

Relay

  1. 1
    Check for continuity between terminals 1 and 3.
    A/C system relay with a magnified inset of the connector terminals numbered 1, 2, 3 and 4, used to identify the terminals during the continuity test.
  2. 2
    Connect a 12 V battery across terminals 2 and 4. There should be continuity between terminals 1 and 3.
    Internal schematic of the relay showing the switch contacts across terminals 1 and 3 and the coil across terminals 2 and 4.

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