I get a lot of Ice/heavy frost buildup on the coils at the bottom of the freezer within just a few days after defrosting. I have read online that it can be either the defrost heater, defrost timer, defrost sensor or Vikings adaptive defrost control? Anyway I want to know where the defrost sensor, defrost timer and or adaptive control can be located and how to test them. I know how to test the heater and sensor using a ohm meter but not sure how to test the other items. It would be nice if you have a parts breakdown that you can send so these items can be easily located.
Just defrosting often and made sure the evaporator fan was intact and working which it is.
- Guest asked 9 years ago
OK. So the only part that is left is the H.V board, which controls the defrost system on this unit. This is the ADC of your unit. Replacing the H.V board should take care of your defrost issue. It is number 5 on the control assembly break down. Looks like there are two different ones depending on when you unit was built. Choose the correct one accordingly. According to the defrost flow chart, to manually force a defrost cycle you need to pressing display off and max refrigerator buttons for 3 seconds or beeps.
- Brian, Ace Appliance answered 9 years ago
-
Thanks for all your help and info
-
Your welcome! Good luck with your repair!
-
I was able to get a troubleshooting flowchart for the Defrost system and I was able to Force the Defrost and it worked, So now it says it is either the HV or LV board harness wire connections or possible bad LV Board? Does this sound correct that it would be the LV board and not the HV board? They do not mention the HV board except for checking the wire connections.
- You must login to reply
Hi. Yes, it does sound like you have a defrost system issue. To make this as easy as possible I will tell you how I would diagnose what part is faulty, if indeed you have a defost system failure. First of all, you with either have a defrost timer or Adaptive defrost control (ADC), not both. An ADC takes the place of a defrost timer on new electronic units. If you have an ADC and you have access to the tech sheet on this unit there usually is a daignostic mode that you can force the unit to go into defrost. I would gain access to the heater and defrost thermostat (defrost termination) and check them for conticuity. Note that the defrost thermostat is temperature sensitive and needs to be checked when the temperature is below the rating of the defrost T-stat. If both of these test good then the only componets that are left are the ADC/timer and a sensor if the sensor is present. Not all defrost systems have a defrost/evaporator sensor. If no sensor, then you know everything else in the system tested good and the only part that is left that could be faulty is the timer/ADC. WIth the schematic or tech sheet you could also test for conticuity from the timer or ADC through the defrost system. This will tell you if you have continuity through the heater and defrost t-stat. If you dont you know your issue is with those parts. If you do have continity then you would know your issue is in the timer/ADC or evaporator sensor. I am working on getting you the parts break down of this unit and should have them posted of here soon.
- Brian, Ace Appliance answered 9 years ago
-
Thanks, Also do you know where I can get information on how to run the built in defrost diagnostics
-
Thanks for sending the breakdowns, there was something that looked like a scanned flowchart that I am unable to read though. The Heater element and The Thermostat attached to the coils both test good. At this point I do not have enough information to do any further troubleshooting. If you have any info on how to run the diagnostics or any breakdowns that show if I have a Defrost timer or an ADC would be great.
- You must login to reply
Please login first to submit.
