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crwdns2944351:0crwdnd2944351:0BQP2-4.7 Freezer Relay Repaircrwdnd2944351:0crwdne2944351:0

crwdns2933797:0Perry Tancredicrwdnd2933797:0crwdne2933797:0

crwdns2936043:0crwdne2936043:0 crwdns2933505:0crwdne2933505:0 Perry Tancredi

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BQP2-4.7
Type
replacement
Thing
Freezer Relay
Title
BQP2-4.7 Freezer Relay Repair
Introduction
The motor in a freezer compressors need a little more power to start up and get going. They achieve that extra power through a second coil that is energized when it's first turned on, and then quickly turns off. Once spinning, the motor can keep spinning with only one coil.
The second coil is controlled by a starter relay. It works with a thermistor - a resistor whose resistance increases once it reaches a certain temperature, thereby cutting current to the starting coil.
If the starting coil burns out, you might notice your freezer not getting cold while compressor gets warm. often the thermistor will shatter, and you can hear it rattling around in the relay, but not always. You can check the relay with an ohmmeter. The BQP2-4.7 should read about 4.7 ohms at room temperature. Any other reading means it's probably failed.
For whatever reason, it's relatively impossible to get your hands on a BQP2-4.7, so we're going to repair one using parts from an easy to find and inexpensive similar relay - the QP2-4R7.
Time Required Min
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Time Required Max
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Imageid
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Difficulty
Moderate
Conclusion
Put the relay into the
Author
Perry Tancredi
Public
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  • 2.5x40mm flathead screwdriver or other prying device x1 added.
  • Small Needle Nose Pliers x1 added.

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  • QP2-4R7 x1 added.

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  • In Progress added.
  • Community-Contributed Guide added.

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