I have a Maytag PTB1953DR refrigerator, would the timer be shot again?
I have a Maytag PTB1953DR refrigerator. The freezer coil was frozen again so I replaced the thermostat on the coil. This is the second time. I replaced the timer about two years ago, would it be shot already?
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Re: I have a Maytag PTB1953DR refrigerator, would the...
The timer should last a lot longer than that, but I have received bad ones right out of the box. Depending on model year, the full current of the compressor and the defrost heater are present in the defrost timer contacts. The defrost heater should be checked with a volt-ohm meter if continued icing takes place. The defrost heater will have a positive ohm reading if it is okay. If the meter reads infinity or 0.0 ohms, the heater is bad.
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Many times a freezer and/or refrigeratordo not work right because of a dirty condenser coil...there are also many otherthings that can go wrong.
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Check out these tips that I wrote about that... it is a great place to starttrouble shooting your unit...and something that you can do rather then callinga repair person to do a simple thing for you...
Defrost circuit failed, needs to be able to defrost the coils so air can pass through them thus cooling evenly. You can check the heaters located on the coils probably near the bottom back wall of the freezer with a ohm meter if you read through, the heaters are good, if you get no reading the heaters are bad. Or could be defrost timer or on newer models the adaptive defrost control which is a circuit board. If its an older model you can manually turn the timer with a screwdriver if you feel resistance, then you should replace the timer. Also in the circuit is the defrost thermostat located on the coils, this is the least expensive of the 3 components to replace. You should have a schematic located under the fridge, use this to determine which type of timer you have and for further trouble-shooting. Please let me know if this helps
The defrost cycle is not working properly, there are three things involved in system. #1 Defrost timer in refrigerator #2 Thermostat on coils to tell if unit is frozen #3 heater element located under coils thaws coils when frozen. the defrost timer if it is manual < located at the front of light assembly panel in top of refrigerator there will be a hole with a plastic piece that resembles a screw strait screw head> it turns and every 8hrs aprox. it stops operations and starts defrost cycle by allowing voltage to the thermostat and if thermostat is frozen it allows power to element for thawing coils. If defrost timer is manual look for direction it is facing and mark edge to see if timer is turning< very slow turning and is easiest way> if you can get an ohm meter ohm the element on high setting< if it has continuity element is operable> check wiring just to be sure not problem. If you find the timer does turn and doesn't stay in one position over 40 minutes then the thermostat is bad.If element fails tesing then the element is bad and if timer stays in one position then it is bad. If unit is equiped with electronic defrost timer and element is good in would replace timer and thermostat to guaranty that resolved problem
If it happens again, check the defrost timer. If it does not self defrost, the cooling coils (evaporator) get plugged with ice and although it is frozen, the ice stops the transfer of heat. Unplugging the unit allowed it to defrost so air could circulate again.