Are Sierra thermostats OK?

[rudderless]

Luckily one can very easily introduce that notch into said thermostat without notch. When would notch be a bad idea anyway…

Remember engineers are human too with human faults. Same with the bean counters who probably specified the same thermo for other applications without actually doing their homework.

[Casey Lynn]

quote rudderless:

Luckily one can very easily introduce that notch into said thermostat without notch. When would notch be a bad idea anyway…

Remember engineers are human too with human faults. Same with the bean counters who probably specified the same thermo for other applications without actually doing their homework.

Pretty much hit the nail on the head with that post!

[johnyrude200]

To Frank’s point, I’ve wondered the same thing when replacing an original failed thermostat with the little relief hole with one that does not have this. Tracing the same water path on these motors (6hp), I concluded the same thing, how does an air pocket get by without that relief notch?

My solution was to just take the new thermostat and make one (simple with a pair of sheet metal shears). Why fool with the original design…won’t get blamed that way! I just figured it was replacement parts that simply weren’t of the same design.

The newer motors that have the pressure springs built into the thermostats, FINE, no matter if there is that relief hole on the top the the t-stat itself.

[Author]

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