Step 7. Check wire No. 6 for continuity using the following procedures:
a. Remove thermal delay relay tube TD2 and cut splice from wire No. 6 near the S1 switch located in top of the boiler assembly.
b. Use multimeter to check for continuity between ends of wire No. 6 while it is being flexed along its entire length. Stick one multimeter probe
into thermal delay relay TD2 socket, hole 7, and the other multimeter probe onto end of wire No. 6.
Reattach wire No. 6 to thermostatic switch S1 by replacing with new splice if continuity is indicated.
Replace wire No. 6 to the thermal delay relay tube TD2 socket, hole 7. Splice wire near the thermostatic switch S1 on top of boiler, Replace
splice to connect the two wires after stripping wires.
Reinstall thermal delay relay TD2.
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TM 3-4230-209-30&P