Remove thermostatic valve -1- and fit auxiliary hose -2- onto it.
Cool the thermostatic valve to a temperature below 0°C.
Blow the thermal valve through the hose -2- with your mouth, the valve must allow air to pass through.
Using auxiliary wires, connect the valve contacts to the battery poles with a voltage of 12 V. Repeat the test. After 1-6 seconds the valve should close, otherwise replace the valve.
Warm up thermostatic valve with time delay to room temperature (approx. +20°С to +30°С).
Disconnect the valve from the battery. Measure the resistance between the contacts, it should be 1.87-2.70 ohms.
The workshop can perform a leak test on the vacuum device and check the gap of the air damper.
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