[wwest]

Puzzle..


When in low speed both resistors are in the circuit, in series. Should one of them overheat and thereby cause it's associated thermostatic switch to close the blower speed will increase.

But....

With the thermostatic switch closed the resistor will/would cool to the point that the closed switch should open and the speed should retard. A cycle back and forth should ensue.

The only possible explanation I can come up with is that once the thermostatic switch closes it sticks closed.

File/burnish the contacts so the contact surface is smooth..?


Or did adjusting the gap solve the problem?