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Post by 35ckmonitort on Apr 18, 2023 18:41:40 GMT
Hello everyone, it's been some time since I've poked my head in here, I guess no news is good news?
Well, my 1929 DR out in the garage was running great, everything has been fine until...
I was needing to unplug the power cord behind the control box, to move some stuff behind the unit, and I had thought I unplugged the cord at the wall plug, first...well, I unplugged the wrong appliance and the monitor top was still plugged in. When I went to unplug it, a spark occurred since the cord was original and apparently delicate! So, a short happened and blew the cord off of the bakelite plug that attaches to the control box.
So, I had a period correct style NEW cloth insulated cord that I replaced the old one with, I plug in the unit and wait a few days to let the heater do it's thing. Well, I snap on the fridge and it was running just fine...but, for what seemed to me much too long. In the past, it took about 20 minutes to run to see ice form on the evaporator, this was happening but it was still running, and the temperature in the garage around 55oF. So, why was it taking so long? I turned it off and let it sit. I'm 90% positive the heater still works, since I was getting ice on the evaporator but, would a short kill my cartridge heater?
Any help and suggestions are greatly appreciated.
Your forgotten member,
Robert-
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Post by 35ckmonitort on Apr 18, 2023 22:41:46 GMT
No help? Nothing for an older established member? I'm sorry I've been absent but, really?
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Post by cablehack on Apr 18, 2023 23:47:30 GMT
I don't know much about DR's, but if you are concerned about the possibility of the oil heater not working, I would suggest using a plug in power meter to see that there is about 12-15W power consumption with the compressor switched off. Alternatively, measure the resistance between the plug pins and see there's a resistance somewhere around 1000 ohms. A short in the power cable won't damage the heater. Beyond that, one of the DR experts would be best to advise.
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Post by turbokinetic on Apr 19, 2023 11:05:20 GMT
No help? Nothing for an older established member? I'm sorry I've been absent but, really? I'm sorry you have been waiting for an answer to your question. I know that many of our resident experts are in the HVAC business and are in a very busy season. I have been on duty at work for weeks. As for the cord failure damaging the cartridge heater, it's very unlikely. However, if the heater failed previously while the machine was running, it would probably have continued to work normally; or at least outwardly normally. However, after the cord failed and everything cooled off inside the compressor, it may have had a hard time starting back up. As Cablehack said, you need to confirm the operation of the heater by measuring either the resistance at the pins of the power cord, or measuring power demand during the off-cycle. Another possibility would be that the cord getting "yanked" to the side has jarred or altered the control somehow, so that it isn't turning off. You mentioned that ice formed on the evaporator but it didn't cycle off. It may have been over-cooling beyond where the control should have cycled off. I would give it another run, after confirming the heater is good. Sincerely, David
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Post by turbokinetic on May 1, 2023 13:03:55 GMT
Hello everyone, it's been some time since I've poked my head in here, I guess no news is good news? Well, my 1929 DR out in the garage was running great, everything has been fine until... Hey Robert, just curious if you were able to get this fixed?
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