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PTC Start Relay QP2-15

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by BB78 » Sun Sep 17, 2017 9:17 pm

So my freezer decided to die on me today, it kept clicking but the compressor wouldn't run, I think I've tracked the problem down to the PTC Start Relay but I'm struggling to find a replacement other than ordering one from Hong Kong and waiting weeks for it to be delivered.
The freezer is a Logik LUF55B13 and the PTC Start Relay has 1 pin and says: QP2-15 AM EP14C518.
(In case it's needed the compressor says: Anhui Meizhi Compressor SZ59E1HL and the Overload Protector says: Star DRB12N61A1 AM 14D-2.)
Am I missing something? Is a replacement start relay not available in the U.K.? If it is can someone point me in the right direction please?
Many Thanks
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by r600a » Mon Sep 18, 2017 7:46 am

Hi

Why would you think that it's the PTC ?

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by BB78 » Mon Sep 18, 2017 11:17 am

When I take it off and shake it it rattles, although that said with the probes right inside the holes I was getting 15ohms on one setting on the multimeter. I also tested each pin on the compressor and was getting readings, although admittedly I'm no expert to know if they are right.
Do you think it could be something else then?
The freezer is only a couple of years old and just started doing this out of the blue, it makes a click which sounds like it's coming from the area of the PTC & overload, the compressor doesn't start, about 30 seconds later it clicks again, wait a few minutes and the cycle starts again so it sounds like it's trying to start but can't.
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by r600a » Mon Sep 18, 2017 1:15 pm

Hi

Very doubtful its a PTC fault then. More likely the compressor as its a cheap chinese one.

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by BB78 » Mon Sep 18, 2017 1:40 pm

Oh don't say that cause that means a new freezer.
I'll have to get the multimeter out again because I can't remember the readings but I've read that what I'm looking for on the compressor is the highest reading across 2 pins and the other two readings should add up to the highest reading within 1/2ohms if the compressor is fine.
My only other way of checking it would be to see what PTC is on the fridge and try swapping them if they are the same.
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by r600a » Mon Sep 18, 2017 1:49 pm

Compressor..Sorry
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by ED1 » Mon Oct 09, 2017 1:57 pm

Hi BB78, did you manage to repair yours or did you have to get a new freezer. We're having exactly the same problem (I came here looking for the same parts as you)
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by BB78 » Mon Oct 09, 2017 2:24 pm

Hi ED1, I've got to admit I haven't done anything about it, from the advice I received I've kind of taken it as read that it's the compressor and I need a new freezer and if that's the case I've got to decide between buying another undercounted freezer or going back to a tall fridge freezer.
I would love to know for sure as everything I've read says that the rattling start relay suggests that it's broken and I'm not entirely sure whether I'm using the right setting on the multimeter.
I might just order one of the relays I've found on eBay & wait however long for it to be delivered, for the sake of a couple of quid I'd then know for sure.
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by BB78 » Thu Oct 12, 2017 11:08 pm

Confirmed the problem is the start relay, took it apart and there was 2 loose chips from the ceramic disc inside, took the disc out, turned it around and put it back in so that it made contact with both metal pins inside again, put it back on the compressor and hey presto! Freezer is working again.
Had already ordered a replacement from Hong Kong which will be here in a few weeks, that cost less than £1.50 and in the meantime I won't keep much in the freezer just in case and will keep an eye on it.
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