Kohler Ford LSG-423 — Thermostat Test (Thermostat Removed)
Testing & diagnosis · Cooling System
For the Kohler Ford LSG-423, from the Kohler service manual.
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Procedure
- Remove the thermostat and immerse it in boiling water
- Replace the thermostat if it does not open at least 0.230 after one minute at 212°F
- If the problem is insufficient heat, check the thermostat for leakage by holding it up to a lighted background
- Leakage of light all around the thermostat valve indicates the thermostat is unacceptable and should be replaced
Specs & values
- Thermostat must open at least 0.230 after one minute at 212°F
Source: Kohler service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.