---
type: lookup
id: e21
asset: appliance-fault-error-codes
title: "E21 — Appliance fault and error codes"
sources:
  - https://www.bosch-home.com/us/owner-support/dishwashers/error-codes
source_quote: "See more Error Code E21 The heat pump is blocked. Reset power to breaker for 30 seconds. If not resolved, call Bosch Customer Support at 1-800-944-2904 for assistance. See more Error Code E22 The dishwasher filter is blocked."
generated: true
verified: false
harvested: 2026-08-04
stale_after: 2027-08-04
brand: "Bosch"
appliance_type: "Dishwasher"
error_code: "E21"
meaning: "The heat pump is blocked."
---
**Brand:** Bosch

**Appliance type:** Dishwasher

**Error code:** E21

**Meaning:** The heat pump is blocked.

> See more Error Code E21 The heat pump is blocked. Reset power to breaker for 30 seconds. If not resolved, call Bosch Customer Support at 1-800-944-2904 for assistance. See more Error Code E22 The dishwasher filter is blocked.

Source: <https://www.bosch-home.com/us/owner-support/dishwashers/error-codes>