Bosch Heat Pump Tumble Dryer Problems

Bosch, renowned for its quality appliances, offers a range of heat pump tumble dryers. One such model, the WTW85250GB, has come under scrutiny by users for not heating as expected. Let’s delve into the core of this problem and discuss potential solutions.

Identifying the Issue

Owners of the Bosch WTW85250GB heat pump dryer have reported instances where the dryer ceases to heat up, even though other functions seem to work seamlessly. The concerns are especially pronounced given that some of these incidents occur shortly after the expiration of the standard 5-year warranty.

Understanding Heat Pump Dryers

For the uninitiated, heat pump dryers don’t typically get as hot as traditional tumble dryers. They operate at lower temperatures, usually producing lukewarm air. This is an energy-efficient process but can sometimes lead to the misconception that the dryer isn’t working optimally.

Possible Causes and Solutions:

1. Clogged Evaporator:
   • Description: One of the primary reasons for diminished heating efficiency is a blocked evaporator, which reduces airflow and therefore drying capability.
   • Solution: The evaporator can be accessed by lifting out the filter inside the dryer door. If you notice a significant buildup of lint or fluff, it will need to be cleaned. It’s essential to be gentle during this process as the evaporator is delicate. Some users recommend using a wire coat hanger to softly pick off and remove the lint.
2. Self-Cleaning Inefficiency:
   • Description: The Bosch heat pump dryer is designed to be self-cleaning. However, some users believe it isn’t entirely effective, with efficiency estimated to be less than 80%. As a result, a significant amount of lint and fluff can accumulate inside the machine over time.
   • Solution: A comprehensive cleaning might require a complete strip-down of the machine. This involves removing both side panels, the rear panel, and the drum. While this can be time-consuming (typically taking 2-3 hours), it ensures a thoroughly cleaned and more efficient dryer. Some users have managed to restore their machines to optimal function following this rigorous cleaning process.
3. Blocked Condenser:
   • Description: After an initial cleaning, if the machine’s performance doesn’t improve, a blocked condenser might be the culprit.
   • Solution: In such cases, it’s advisable to contact Bosch for professional assistance. An engineer can conduct an in-depth strip-down and clean the condenser, which might require specialized equipment like a jet washer.

Professional Assistance and Manufacturer Services:

If you’re hesitant about undertaking a thorough cleaning yourself, Bosch offers a callout service for approximately £106. Should the professionals be unable to fix the issue, they often provide a £50.00 voucher towards a new appliance. Given the intricacy of these machines, many users wonder if manufacturers should offer periodic deep cleaning as a dedicated service, especially considering how common lint buildup seems to be.

In Conclusion:

Appliances, irrespective of their brand, can sometimes falter post-warranty. While this can be frustrating, understanding the underlying issue and being aware of both DIY and professional solutions can save both time and money. In the case of the Bosch WTW85250GB heat pump dryer, regular maintenance and cleaning can ensure longevity and efficient performance.