Problems with Ranco thermostats

[laga77]

When I set up my tanks I used Ranco thermostats to control the heaters because of all the different recommendations out there. That was five years and three different and separate tanks ago. As of last week, I have had to replace all three at different times . They seem to last 2-2.5 years and then start to have problems. Two of them would display a temp of 149 degrees regardless of actual temperature and the other is reading 5 degrees too high. Two were mounted in the sump area and a third was on a shelf between the tank platform and the sump area. I no longer use these and have moved onto a digital thermostat controller made by Inkbird and available through Amazon. Works the same as Ranco and comes completely wired and for less money. Hopefully these will last longer.

 

[mcgyvr]

Good luck.. inkbirds seem to be fine..
Any product can fail but in general Ranco makes great/reliable products..
Calibration may be required...

 

[ClownsRCoo]

Mine is doing the same thing and it has only been about a year or less


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[jd371]

Mine started to go bad too. I waterproofed the sensor on the Ranco, but I think after some time water got in and it failed. I ordered a controller from Amazon to use until I fixed the Ranco. Turns out the controller I bought from Amazon is working great that I just left in place on the DT and moved the Ranco after I fixed it to the QT. The replacement I bought from Amazon has been on the tank for a little over a year now with no issues and keeps the tank steady at 77-78 degrees.

https://www.amazon.com/gp/product/B00LWSPE78/ref=oh_aui_detailpage_o06_s00?ie=UTF8&psc=1