I WANT TO BYPASS THE DEFROST MODE IN MODEL 8145-20

There is a defrost termination thermostat located somewhere near the defrost heater, probably on one end and a bit above the heater. These are located in the lower part of the evaporator coil (the cold coil in the freezer) so you will have to disassemble the freezer to access this. This usually involved removing a cover, but may be more involved depending on your brand and model. Follow the heater wires and one of them should connect to this stat. Stat cut-out temp settings vary, but should be between 40 and 90 degrees - it should be marked on the side of the stat, depending on the location and type of defrost system. If this thermostat is stuck in the closed (on) condition it would account for this sort of failure. Some newer refrigerators use solid state controls with different control systems for defrost so you would have to determine which type you have, but the mechanical thermostat is most typical. It is approximately the size of a quarter, perhaps 1/2 inch thick and typically has a brown and orange wire. Also, look for shorted/burnt wiring since a shorted wire could touch the case and bypass the controls, accounting for this failure mode.

Just turn the defrost tmer clockwise to cause defrost or run conditions. If you bypass the defrost timer you will have problems like shorting of wiring or loss of the timed defrost. Why not replace the defrost timer if you know it is defective? What is the model number of your refrigerator? Thanks Sea Breeze

You can by pass it but I wouldn't. You may need to replace the t'stat on this. This controls pretty much everything. Depending on your model, the defrost cycle can be adjusted to shorter cycles. Bypassing it would eventually lead to ice build up and a real mess to follow .

Hello,

You have a defrost problem and will have to remove the back cover to access the condensor to fix it. You should see a condenser blocked with ice and also blocking heat transfer to freezer. Thaw out with hair dryer then you will need to cut wires to defrost thermostat (round thingy wired before defrost heater) Bypass the thermostat and manually set defrost timer into defrost mode by turning clockwise with screwdriver until you hear a loud click.. if the heater comes on then you have a bad defrost thermostat. If the heater does not come on then you need to check the heater with a ohm meter for continuity.

Take care........

Hi,


You have a defrost problem and will have to remove the back cover to access the condensor to fix it. You should see a condenser blocked with ice and also blocking heat transfer to freezer. Thaw out with hair dryer then you will need to cut wires to defrost thermostat (round thingy wired before defrost heater) Bypass the thermostat and manually set defrost timer into defrost mode by turning clockwise with screwdriver until you hear a loud click.. if the heater comes on then you have a bad defrost thermostat. If the heater does not come on then you need to check the heater with a ohm meter for continuity.


Good luck in solving the problem.......

You could fix it yourself. You have a defrost component failure. Most likely the defrost thermostat or bad heater element. you should see these in the freezer compartment and can run some tests to find the problem. First you need to bypass the defrost thermostat and then manually turn the defrost timer clockwise with a screwdriver until you hear a loud click(the timer is located in the frig compartment next to the control thermostat)You will be in defrost mode. If heaters come on then defrost therm is bad. If heaters do not come on then the heater is bad. you can do it! , I can help

You have a defrost problem and will have to remove the back cover to access the condensor to fix it. You should see a condensor blocked with ice and also blocking heat transfer to freezer. Thaw out with hair dryer then you will need to cut wires to defrost thermostat (round thingy wired before defrost heater) Bypass the thermostat and manually set defrost timer into defrost mode by turning clockwise with screwdriver until you hear a loud click.. if the heater comes on then you have a bad defrost thermostat. If the heater does not come on then you need to check the heater with a ohm meter for continuity. hope this helps

If the refrigerator is not icing up it could be the defrost thermostat making the defrost cycle initiate every time the defrost timer makes defrost available. I do not recommend by-passing the defrost cycle, have the switch checked and replaced if needed.

Don't attempt to bypass defrost mode. If it's cold enough to use as a heat pump, it's cold enough to need the defrost cycle.

It sounds like a sensor issue, although it may be the controller board.

Unless you know how to work on equipment like this, I urge you to get a professional to service the unit for you.

The defrost thermostat sits on the evaporator coil