My Norfrost chest freezer which is 4 years old recently defrosted all food. The green light stays on but doesn t freeze but the red booster light starts a hum at the back of the freezer which we assume is the compressor.

SOURCE: Defrost light stays on

Try advancing the defrost timer manually.

SOURCE: chest freezer

do you have voltage at the compressor? if not you have an open circuit or bad t-stat. if voltage is present and compressor is not running you have a bad start device or bad compessor. if voltage present and compressor runs you have a refrigeration issue get a new freezer.

SOURCE: freezer not freezing

it would apear the stat is the fault. the thermostat is monitoring the temperature of the inner liner and tubing. if the compresor isnt actuly staying on the only part controling it is the stat. if you have the knoledge i would sugest you bypass the contol with the unit unpluged and the plug it in to conferm the fault was the control. p/s you may have a friend who has some knoledge . the control is a simple switch. just enshure the unit is unpluged. hope this helped

SOURCE: I have a Norfrost 100ltr chest freezer that is

Is your circulating fan working?
Sometimes they stick and need a shot of WD 40 and then work
it back and forth a little until it wants to take off again. Keep me informed
and PLEASE give a Thumbs Up for the effort. The Raz Shack

SOURCE: RED TRIANGLE LIGHT STAYS ON CHEST FREEZER IS 10

defrost cycle is innactive, will ice up shortly and may not turn compressor off, defrost the unit totally(Turn off for 2 days with door open) and remove all water from the unit once done. Restart unit and should work normal for a week or so, ie...defrost cycle...get back to me if this is the case and will sort it from there, [email protected] Russ