Verified codeset result
The manufacturer documentation publishes fault code E12 for the Compress 3000 DW FO controller display, mapped to the affected Bosch models listed below.
Fault code E12
Bosch Compress 3000 DW FO controller display: E12
Compress 3000 DW FO controller display
Last verified from the captured official source review.
E12 meaning for this display codeset
This page isolates Bosch fault code E12 for the Compress 3000 DW FO controller display. It does not combine the Bosch E12 meaning with another controller or codeset.
Before applying the Bosch E12 meaning, confirm the affected model uses the Compress 3000 DW FO controller display. In that controller namespace, E12 means documented as abnormal frost formation due to partial evaporator.
The Bosch Compress 3000 DW FO Installation and Operating Instructions source anchor on page 41 supports this Bosch E12 record for the Compress 3000 DW FO controller display.
The permanent source key bosch-compress-3000-hp270-1-display E12 keeps the bosch-compress-3000-hp270-1-display E12 controller/code pairing distinct in publication.
What the documentation says
Documented as Abnormal frost formation due to partial evaporator.
This is a paraphrase of the manufacturer’s documentation. A licensed technician confirms the actual cause.
Severity
Amber means the fault needs attention; contact the manufacturer or a licensed technician if it persists.
Source-grounded diagnosis context
Documented causes
The manual documents abnormal frost formation due to partial evaporator as the code-specific fault condition.
Source: Bosch Compress 3000 DW FO Installation and Operating Instructions, PDF page 41
Owner outcomes
What owners reported next
This aggregate appears after at least three structured reports for this exact codeset and code. Counts come from fixed choices only. Private notes are never shown here.
- Fixed
- Unit replaced
- Still unresolved
Repair, replacement and warranty context
Start with diagnosis, then compare repair and replacement
An amber classification usually calls for a diagnosis and repair quote, not automatic replacement. Compare parts availability, repair cost and system age only after the fault has been confirmed by an appropriately licensed professional.
This brand has a verified current Australian support route, so check warranty coverage with the manufacturer before authorising paid repair or replacement work.
Affected models
Every model mapped to this codeset is listed with the evidence match state used by this site.
- BoschHP 270-1E 0 FOV/SExact manual match
Related codes from this codeset
These codes appear in the same documented controller or display codeset.
Choose the right next step
Warranty or local repair?
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Choose both answers to see the recommended route.
Start with the manufacturer
The unit is under warranty or its coverage is uncertain, so no local repair lead form is shown. Ask the manufacturer about warranty support and keep proof of purchase.
Manufacturer route
Official support
Active support recorded
This brand is recorded as active in the Australian market.
Bosch Home Comfort continues to publish current Australian product and service material for its heat-pump water heaters.
Status checked · Research source
Compress 3000 domestic use: 5 years tank and 2 years parts and labour; commercial use: 1 year parts, labour and tank.
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Official source
Where this result comes from
Bosch Home Comfort. Bosch Compress 3000 DW FO Installation and Operating Instructions, PDF page 41. Retrieved .