Tuxda "cold control for refrigerator" waa qood thermostat oo la xayisiid ah oo leh waxa qaadista "cold cycle"—maamulka waqtii compressor-ka laaqa diyaarinta fridg-ka iyo waqtii ay iska qaadato in la aadayo diyaarinta. Kuma tixgelinayo thermostat-ka caadiga ah, waxa tixraacaya si booska ah ugu dhowaaqda sensor-ka dheerka iyo compressor-ka, iyadoo la leeyahay mekaniismooda awoodda ee lagu dhaqmo fridg-ka. Xirfadaha teknikaal ee muhiim ah waxa ka xusan snap-action switch (si kale ugu yeer iyo ugu xidh compressor-ka) iyo isbeddelka diferensiga dheerka (taas oo ogola in teknisyenku u dejinayo farqiga u dhexeeya dheerka ee "on" iyo "off"—si gaaban 1°C iyo 2°C ee fridgoyinka leh jidka, 0.5°C ee qoodka masaalma). Qaabka jidka, tuxdarrada cold control ee fudud waa mekaaniskaal (bimetallic strip-based) leh isbeddelka qabka fudud (oo loo malaynayaa "Cold" iyo "Coldest"), lacagta $20- $40 iyo la xiriira fridgoyinka hoose ee dhalinyarada (sida Whirlpool, Frigidaire). Tuxdarrada cold control ee masaalma, midabna, waa elektornik leh aragtooyinka dijiitaal, taas oo helita dhaqan faraaxsan ee ±0.3°C iyo la xiriirka defrost cycles (kaydsanaya frost buildup oo dhaqan diyaarinta). Kula shidka $60-$120 iyo ay fulihiin standartoyinka sida NSF/ANSI 7 (Ameerika Waqooyi) ama EN 60335-2-24 (Iburub). Xirfadaha awoodda muhiim ah waxa ka xusan laaqa dhaqaale (shutting off the compressor if current exceeds safe levels) iyo botanka dib u soo celinta (si loo soojiyo xaaladaha xadgudbiy). Tixraacida waa isbeddel ah qabka: cold control ee la xiriirayo (waxaa jiraa fridgoyinka jidka) helita fudud DIY loo badalo, haddii kale qoodka masaalma ee la xiriirayo midba waa in la isticmaalaa teknisyen. Halwagar raadnimada waa la xidhiidha iyadoo la isticmaalayo doorashada voltaajka (110V/220V) iyo beddelka koodka dheerka (°C/°F), iyadoo la leeyahay deeqda tixraacida ee bararka (Ingiriis, Isbaanish, Faransiis, Mandarin) si ay ugu dhammaystaan isticmaaleyna geografiga.