Heat the liquid 2 temperature sensor. Check resistance between conclusions of the socket of a plait of the block of valves 1. Thus make sure that its resistance decreases in process of heating 
(fig. 3.103).
 
10 °C – 5,8–7,1 kOhm. 
110 °C – 231–263 kOhm. 
145 °C – 105–117 kOhm.