chiller unable to cut off

[teowxu]

hi i'm using a teco chiller for my tank. recently i have encountered a problem with my chiller. when i set it to 25degrees, it is able to chill. however, it does not cut off at 25 degree. instead, it continue to chill. sometimes even till 16 degree. anybody know which part of the chiller is spoilt and where can i get the spare part? or anybody know who i can contact to repair my chiller? thanks a lot

[tawauboy]

could be controller or sensor.
maybe you can check with system and control engineering at blk 22 boon keng

[hann]

It should be a faulty thermostat. Get an external to connect to your chiller.

[li_gangyi]

If the thermostat displays the right temperature, but the compressor doesn't switch off, probably some kinda stuck relay in the unit. In this case, there are 2 ways to fix it, get the original relay replaced, or get an external thermostat, both will get your chiller to work right again.
The external thermostat does have the added bonus of being about to measure the temp from right within your tank instead of the water in the chiller, which should be a better gauge.