Easy Heat EH38 Pre-Set Thermostat

In the great white north, summers are short, and every year it seemed like right after I had winterized the boat and put it away, we'd get a last ditch week of sunshine. When you only have a couple of months of boating season, a week or so is significant. A few years, right after a nice sunny week, we'd take the boat out of the garage and get it ready, only to have a late May freeze/snow hit and have to contrive all sorts of MacGuyvered things to keep the block from freezing. I set this up with ACU_RITE Refrigerator/Freezer Wireless Digital Thermometer 00986 and a small (200w) quartz heater set on low, and it has worked FLAWLESSLY this year, keeping the block at a more or less constant 36-38 with outside temps well below 0. I made sure it was cycling by plugging cord(s) in and putting the unit in the freezer before I trusted my engine to it, and found out it comes on at 35 and shuts down again at 45. I ran a heavy extension into the engine hold, placed this level with the oil pan, and then plugged the heater into this and set the heater on a sheet of melamine at about water pump level. Absolutely no chance of the block freezing, and much less energy wasted than a timer would have caused. I can monitor the temps from inside, with a history of high and low temps, and it has been VERY reliable for the month or so it's been in use. If there was a heater thermostat problem, this would cut the power if the temp got too warm as well, so it's also a failsafe on the high temp side. Maybe the negative feedback is due to QC issues, but all I can say for sure is that the unit I got works perfectly, is priced right, and does precisely what I needed it to do. It has given me some ideas for lots of other winter safeguards, and I'll be buying more.

Still working after 10 years! I bought 2 of these in 2016. Both still working fine this year. I also bought 2 of a cheaper brand that failed after the first year. Gonna buy 2 more of these as backup 'cause nothing last forever. I hope the new ones are as good as the old!

I was pleased as punch when this worked as advertised last winter. But this autumn, with the first cold snap and snow, the thermostat failed. I placed it in the freezer for five minutes and tested with my voltmeter. Nothing. Dead and worthless. Now searching for a reliable unit. 2 hours later . . . After posting my original review, I started looking online for a new unit and stumbled across folks writing that a different manufacturer's product needed to be placed in the freezer for 45 minutes to reset the thermostat. Having nothing to lose, I tried this with this product. To my surprise, I plugged it in and the unit works again!

Only turns on when the temp drops below 38°. Accurate and effective.

Save your heat tape from heating during summer! This is the only one I could find. Works great and saves money.

Turns on at 45. Need to turn on at 35. Used in chicken coop

Worked Great

I have an outdoor well house here in Michigan. I have to run a milk house heater I bought here from Amazon. It has a very erratic thermostat. I was constantly having to bump up the heat, and this would cause the heater to run too long. I bought this thermostat it kicks on at 37.5 and off at 41.5 this should really help with my electric bill. I'd highly recommend this thermostat.