Compressor Starting With Failed Start Relay? How Can This Be?

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Samsung Refrigerator

Refrigerators produced by Samsung.

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iBreakIt @ibreakit66745

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投稿日: 昨日2024年7月1日

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Compressor Starting With Failed Start Relay? How Can This Be?

Three weeks ago, the freezer section of my Samsung refrigerator (twin cooling) just stopped getting cold. No warning or previous symptoms. No error codes flashing. None coming up during self-diagnostic. The fridge section is also only getting down to 50 degrees. Here's what I've checked so far:
- Set temps: Freezer -2, Fridge 34.
- Actual room temps: Freezer 70, Fridge 55.
- No icing on the evap coils.
- All temp thermistors tested accurate.
- All fans tested fine.
- Condenser coils clean, and fan working.
- 115V present on SMPS PCB. DC170 found at BD1 rectifier (good).
- 12V and 5V outputs on SMPS PCB good.
- Front panel seems to operate normally.
- Test mode works as it should. As does demo mode.
- Tried resetting several times and left unplugged for a couple hours. No change.
- Compressor starts fine. No unusual noises. No short cycling.
- No continuity when testing start relay (DA35-00103B, PTC thermistor). Relay resistance tested very high - 1.2K ohms at room temp.
- OLP tested fine.
- Run cap tested fine.
- The compressor also stops running before reaching set temps. This could be due to OLP kicking in.

Q. So, how is the compressor starting with a failed start relay?
Q. Could a failed start relay cause the compressor to start but not cool the unit effectively?

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Hi @ibreakit66745,

What is the model number of the refrigerator?

How long does the compressor run for after starting?

jayeff さんによる昨日2024年7月1日

Thanks. It’s a Samsung RF267ABBP. Not sure exactly how long the compressor runs before stopping, but I do know it’s a long time - several hours. No short cycling. And it never reaches either set temps.

iBreakIt さんによる16時間前2024年7月2日

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Hi @ibreakit66745,

What is the model number of the refrigerator?

How long does the compressor run for after starting? — jayeff
Thanks. It’s a Samsung RF267ABBP. Not sure exactly how long the compressor runs before stopping, but I do know it’s a long time - several hours. No short cycling. And it never reaches either set temps. — iBreakIt

jayeff @jayeff 評価: 460.1千 11 373 1.5千 · Answer 1 · 2024-07-02T08:30:34-07:00

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jayeff @jayeff

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投稿日: 16時間前2024年7月2日

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Hi @ibreakit66745

Re the start relay - according to the service manual the resistance value should be 10 Ohms. Perhaps it is faulty and re-operating when it shouldn't thereby causing the OLP to operate.

How hot is the compressor getting?

Seems like there's a problem with the sealed system, either a lack of refrigerant or a compressor problem.

The manual doesn't specify the pressures only the type and amount of refrigerant in the system - see p.14

You may have to get the sealed system suction and high pressures tested to know what and where the problem is.

Depending on your location, you may have to get a licensed refrigerator repair service to do this, due to the environmental regulations regarding the handling of refrigerant gases. They also have the correct gear to do this.

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Samsung Refrigerator

Compressor Starting With Failed Start Relay? How Can This Be?

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