Bertazzoni Freezers E5 Error: Freezer frost sensor failure
What Does E5 Mean on a Bertazzoni Freezer? E5 on a Bertazzoni column freezer indicates a failure of the defrost termination sensor — the thermistor mounted on the evaporator coil that signals the control board to end the automatic defrost cycle at the correct temperature. Without a valid sensor signal the defrost cycle cannot terminate […]
Quick Assessment
Answer to continue safely
Is it safe to keep using?
No. A failed defrost sensor leads to unchecked frost accumulation that will progressively impair cooling performance and may eventually prevent the freezer from maintaining safe temperatures.
Can I reset the code?
No. E5 reflects a failed physical sensor; a reset does not restore sensor function and the code will return after the next defrost cycle attempt.
When to stop immediately?
Stop if you notice: Visible frost covers a significant portion of the freezer back wall., Freezer temperature rises above safe storage levels despite the compressor running..
Symptoms You May Notice
Excessive frost accumulates on freezer evaporator or walls
More ice than normal builds up on the freezer back wall or evaporator coils because the defrost cycle cannot terminate at the correct evaporator temperature.
Cooling performance gradually declines
As frost builds over days or weeks, the evaporator coils become insulated by ice, reducing their ability to absorb heat and maintain the target freezer temperature.
Possible Causes
Failed defrost termination thermistor
The sensor mounted on the evaporator coil that signals the end of the defrost cycle has failed, causing defrost to either run too long (melting food) or not long enough (leaving frost).
Requires ProfessionalDamaged sensor wiring or connector
The wiring harness to the frost sensor is broken or the connector has corroded, breaking the signal circuit.
Requires ProfessionalSafe Checks You Can Do
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1
Inspect the freezer back wall for frost build-up
Open the freezer and look at the back wall interior panel. A thick white layer of frost, particularly concentrated in one area, is a sign the defrost cycle is not completing correctly.
A thin uniform frost layer across a large area is more normal than a thick concentrated slab on one section.
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2
Manually defrost the freezer
Transfer food to a backup freezer, switch off the appliance, and leave the door open to allow all frost to melt naturally. Dry the interior thoroughly before switching back on.
Manual defrosting provides temporary relief but E5 will return if the defrost sensor is not replaced.
When to Call a Professional
Contact a qualified technician if:
- E5 returns after a full manual defrost and power-cycle.
- Defrost termination thermistor resistance is outside specification.
- Frost build-up recurs within days after manual defrosting.
Need Professional Help?
Find qualified technicians in your area for proper diagnostics and repair.
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