I hear you...but I've just been to the number one guy in the UK and bought a replacement.
Once fitted the temp was off the gauge in 3 mins....no heat in the radiator or front pipes...water in the header tank still cold..but engine steaming....as a process of elimination shall I remove the stat completley..I think it maybe the pump though as it ran with this type of stat in when the appraiser drove it in StLouise...if it was stuck I'd understand it but it must have worked for him...
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