G1330B Thermostac can not cooling bellow 10°C

Good morning. In one of ours Lab, we have a 1200 HPLC with a G1330B thermostat which does not allow cooling bellow 10°C. This allows working at any temperature that not bellow the mentioned value. It was reviewed and evidenced that there is not obstruction in the condensed water outlet. Is it possible that the problem  is associated with the peltiers or is related to an electronic component. 

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