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Thermosat [message #355512] Tue, 09 June 2020 09:53 Go to previous message
Larry is currently offline  Larry   United States
Messages: 2875
Registered: January 2004
Location: Menomonie, WI
Karma:
Senior Member
How are they suppose to work?

I have three thermostats in hot water. A Stant 195, a brass Robetshaw 195, and a steel Robertshaw 195.
Here is how they open

Stant begins opening at 190, full open at 195. (This one ran at 195 unless ambient was above 85, then ran to 200.)
Brass Robertshaw begins open at 175, full open at 185. (This is an old one I took out because engine ran colder than I wanted. Hard to get heat out of dash in cold weather)
Steel Robertshaw begins open at 194 full open at 204 but does not open as far as the brass RS. (This is a brand new one, not run yet)

How is a 195 suppose to operate?

IMO a 195 should begin open at 192 or so with full open 197 or something like that.

What do ya all think?


Larry Smile
78 Royale w/500 Caddy
Menomonie, WI.

[Updated on: Tue, 09 June 2020 09:56]

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