The red warning light is coming on which according to the manual means the temperature is too high. The defrost thermostat ends auto defrost cycle when temp reaches 32F and compressor and evap fan are started again and the temp thermostat controls operation until next defrost cycle.Hi, I have a Hotpoint FZ175 upright frost free freezer about 10 years old. This action continues until the defrost timer starts auto defrost cycle. When temp rises a few degrees they're started again to drive temp back down so as to maintain temp close to set temp. In your model everything is controlled by the defrost timer, the temp thermostat and the defrost thermostat.įreezer compressor and evap fan run until the temp thermostat signals set temp is reached, this stops both. I meant that some refrigerators and freezers have a control board instead of a defrost timer not as well as. If you mean "control board" your model doesn't have one. 120VAC Unfortunately I don't know how to force a defrost cycle for your model so that you can easily check for the voltage.Īlso hope I didn't mislead you when you say that you're going to check the "board". IMPORTANT Be safety aware the element operates at mains voltage i.e. If the element tests OK you may want to check the power to the element. I'm not sure what it is but usually they're between 25-50 Ohms. Here’s a link showing all the parts for your freezer and their location which may help in the the power from the fridge and then disconnect the heater element and use an Ohmmeter to measure the element's resistance. If everything was working as it should there wouldn’t be that much ice build up in 8-11 hours anyway so not much ice has to melt and drain and then evaporate under the freezer but if there is a problem it may take a few days or more before it becomes evidentĪpologies for the long answer but thought that if you understand the process it is easier to know what might be wrong when problems occur. So the complaint will be freezer too warm -) The ice will just continue to build until eventually it ices over the evaporator fan and it will stop running and the freezer temperature will rise due to no cold air being blown throughout to keep it at the correct temp. Usually there is no water overflow as the temp has never been allowed to rise that far to melt any ice or the heater turned on, but it may be an intermittent problem etc so it could happen If the defrost timer is faulty then the auto defrost cycle will most probably never happen so the ice just keeps on building up. all the ice has not melted during the defrost cycle. If the heater is faulty then the ice will continue to build up as enough ice i.e. If the drain tube is blocked then the ice melt water can not run away and will overflow the bottom of the freezer and also will build up as more ice when the freezer temperature drops again after the defrost cycle has finished. Due either to a blocked drain tube, a faulty defrost heater or a faulty defrost timer (or control board if the unit has one instead) Water/ice problems in a refrigerator or freezer are usually because of a problem with the auto defrost cycle. The normal set operating temperature is approx. The defrost timer is also reset so that the cycle will occur again sometime between 8-11 hours later. When the temp reaches 32+ F the defrost thermostat operates and the heater is turned off and the compressor and evaporator fan are turned on again to drive the temp back down to the set temperature. The melting process is sped up by turning on a defrost heater which is under the evaporator unit. F to melt the ice formed on the evaporator unit at the back inside the compartment at the bottom behind a panel and to drain away to the evaporator pan under the freezer. The auto defrost cycle takes about 20-25 minutes to complete.ĭuring the auto defrost cycle the compressor and the evaporator fan are both turned off and the temperature is allowed to rise to >32 deg. I don’t know how exactly how often for your model but it should be within this time frame). The defrost cycle occurs once every 8-11 hours (depends on the manufacturer. The automatic defrost cycle is controlled by the defrost timer. If so it has an automatic defrost system.
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