Mine was set to somewhere below 40 (38, I think), but I had one of the techs from the PB reset it to 41 because my equiptment is next to the brick on my house on the east side. This side gets full sun, the brick retains and radiates heat, and because of this the Omnilogic reports a higher outdoor temp than the actual temperature. With this being the case, the actual air temp was below 32, water temp was in the high 30’s but my pump was not turning on because the Omnilogic reading was over 40 from the radiant heat. It’s a little annoying that I have to have the trigger temp set so high but better safe than sorry.