Anybody else having trouble with these things. I've had several lose it's temp. accuracy in about 9 months. The parts house guy told me i must be doing something wrong. I then asked him if it's 55° in his store. while turning the dial on the stat that's clicking (contacts closing) at 55°. It should have been clicking at 75°F or so. When he finally comprehended what i was doing he gave me warranty credit.
I got a digital A-419 instead.