Runnin hot...bah!

[kamikaze]

Tin:

Roger - I miss understood, although I have an idea that is off the wall but may just help verify what the problem is.

Temporarily remove the water hoses from the top of the heads and block as shown in the picture in your earlier posting and connect a new temporary drain hose with a manual on/off valve that is rigged to drain over the side. Run with the hood off and at speed open the valve. Verify water pressure drops and alarm no longer sounds. ( You should be by passing any blockage that may exist under the power head and the water flow should cool the motor as intended. At least then you'll know it's a blockage for sure vice a faulty alarm or something else inducing the problem.

Kamikaze