Hysteresis not kicking in at setpoint (over "heating")

[cyberbackpacker]

I have a very simple cooling on/off process running on a newly purchased BCS-462 running 3.7

I have had an original 460 and just recently sold a 462 in order to build a new system. So I am familiar and comfortable programming processes, etc.

The first thing I bought was this new 462. I am reusing my probes from my previous 462 that I got from Brewer's hardware.

I have my hysteresis for my kegerator set to 46F +/- 1F. However it has been rising to almost 49F (48.6F) before it is kicking on. Because of the nature, I expect it may drop more than 1F below the setpoint when cooling (it is getting down to as cold as 43.8), but I cannot figure out why it is not turning on right at 47F.

The probe was being erratic, so I have it connected to an earth ground (like I have had to do in the past), and the temp is not jumping wildly... it does seem linear.

Any help would be greatly appreciated... I don't want crazy compressor cycles (length or frequency) to toast my kegerator!

I just started using this on Friday if it helps.

-Kevin

[JonW]

Some screen shots of your setup would help.

Did you import the config from the 460 to the 462 or set it up from scratch?