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Heating, Air Conditioning, Fridge, HVAC/Replacing refrigerator temperature control

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Question
Due to the fact that my refrigerator is always too warm or too cold
,regardless of how much I fiddle with the control,I have decided to replace the temperature control.The problem is that is is a no name unit which has already had the control replaced(with a different type than the original).I measured the refrigerator and would like to know what I ask for when I go into the store.If they don't have an exact replacement will they be able to find something compatible?
This is the same brand and looks similar to my present control
http://www.grainger.com/product/6KXG5?cm_sp=HIO-_-HIDP-_-BTM_V2V&cm_vc=IDPBVZ12  .Thanks.

Answer
Jim,
   There 2 styles of thermostat typically in small  refrigeration units . The thermostats basically look the same but the way the sensing bulb/capillarity tube mounts in the unit determines which to buy. An air sensing thermostat style sensing bulb is mounted where it senses the ambient temperature of the conditioned space . The other style senses the evaporator coil temperature which is much colder than ambient temp. The sensing bulb/capillary tube of this style is inserted into the evaporator coil , because of this the temp range of the thermostat is much colder .
 Look at the side of the thermostat you removed - you should have a temp range listed 34 to 55 degree would be air sensing , 15 to 20 degree range would be a coil sensing thermostat. Hope this helps .
         http://www.airzero.com
         Marcus

Heating, Air Conditioning, Fridge, HVAC

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Marcus Cass

Expertise

I can answer question regarding small refrigeration units ,walk in cooler/freezer,commercial ice machines,exhaust hoods,supermarket rack systems,all residential air conditioning units and commercial air conditioning equipment. No appliance questions please

Experience

20 years plus experience in supermarket chains , restaurant refrigeration service , and residential and commercial air conditioning service. Florida class A air conditioning contractor. Currently own an air condition and refrigeration company.

Education/Credentials
Graduated trade school , hundreds of hours of manufacturer training as well as in house training over the years and best of all - hands on real world experience . Class A license holder in Florida

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