Re: Elitech STC 1000 just went dead !!!!! "SORTED"

Buster · Post by **Buster** » Sat Mar 05, 2016 7:54 pm

Any electronics enthusiast,s out there know how to repair an Elitech STC 1000 Temp Controller ???... was working perfectly ok yesterday, switched it off to clean the probe wire and now its dead, I have metered the mains in to the transformer and out the other side which was 13v and also the small bridge reci. Any help/info tips voltage checks, greatly received.

tourer · Post by **tourer** » Sat Mar 05, 2016 10:02 pm

Buster that happened to me a couple of days ago. Conditioning bottles in the fridge and the heater stopped working after faffing around with the heater i figured it was the STC. while messing around on top of the fridge the STC clicked so i assume it was a stuck relay, are there relays in these things? Give yours a tap and see.
good luck

Buster · Post by **Buster** » Sat Mar 05, 2016 10:16 pm

tourer wrote:Buster that happened to me a couple of days ago. Conditioning bottles in the fridge and the heater stopped working after faffing around with the heater i figured it was the STC. while messing around on top of the fridge the STC clicked so i assume it was a stuck relay, are there relays in these things? Give yours a tap and see.
good luck

Yes , there are 2 relays but they are controlled from the microprocessor.....mine is dead (No front LED) nothing. Power is going to it as I have checked.

bobsbeer · Post by **bobsbeer** » Sun Mar 06, 2016 12:17 am

The relays are easy to desolder and replace. Just look at the values on the side to get a replacement. Although probably just as easy to get a new STC.

Buster · Post by **Buster** » Sun Mar 06, 2016 10:55 am

bobsbeer wrote:The relays are easy to desolder and replace. Just look at the values on the side to get a replacement. Although probably just as easy to get a new STC.

Cheers Bob, but aren't the relays on the output side ?? How would that stop the thing from powering up, I have approx 13v coming from the bridge rectifier, which is correct as I checked it against a working one but it still wont light up ??

Brewedout · Post by **Brewedout** » Sun Mar 06, 2016 3:30 pm

Personally I'd file it under B1N and buy a new one for £12. Or you may risk spending out and still having to replace. At £12 it is relatively low cost.

Hairybiker · Post by **Hairybiker** » Sun Mar 06, 2016 4:31 pm

Only one I have had fail was a sensor error, but it was displaying weird temps. I would just dump it as they aren't really user repairable.

Buster · Post by **Buster** » Sun Mar 06, 2016 5:29 pm

" YAY " $\:D/$ $\:D/$ $\:D/$ "YAY" Sorted it at last, the ON/OFF momentary push to make switch had somehow got jammed stopping it from turning on. I managed to meter it in both modes and there was no continuity when pushed or hald for 3 seconds, so it was permanently in the OFF state. I bridged the contacts for 3 seconds and it burst into life, so I have soldered 2 Kynar wires to the switch and trailed them out the air vent just incase it goes back to the off state so I can reset it back on. Happy ending

Brewedout · Post by **Brewedout** » Sun Mar 06, 2016 9:18 pm

I don't know much about electronics but if I were you I'd still change it for a new unit. Faulty electronics could be a fire risk.

Wonkydonkey · Post by **Wonkydonkey** » Mon Mar 07, 2016 8:58 am

Brewedout wrote:I don't know much about electronics but if I were you I'd still change it for a new unit. Faulty electronics could be a fire risk.

If It was the on/off switch. Which to turn it on/off you have to push and hold it. I'm not sure how can that be a fire risk.

Hairybiker · Post by **Hairybiker** » Mon Mar 07, 2016 11:10 am

Agreed a stuck switch is not a fire hazard unless it is stuck ON.

Buster · Post by **Buster** » Mon Mar 07, 2016 11:20 am

Hairybiker wrote:Agreed a stuck switch is not a fire hazard unless it is stuck ON.

Agree 100% ... its only a push to make switch. I decided to replace it anyways, its one of these.

Hairybiker · Post by **Hairybiker** » Mon Mar 07, 2016 12:18 pm

Very common, arduino/pi projects use them. I think I have several lying about here.

Buster · Post by **Buster** » Mon Mar 07, 2016 1:08 pm

Hairybiker wrote:Very common, arduino/pi projects use them. I think I have several lying about here.

Same here, I have a load of old boards with them on from old projects. Made Sunday interesting and delivered great satisfaction in the joy of "Fixed it"... also saved around £12.00 in the process.

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