Bosch Dishwasher Error Code F52

F52 means the heater pressure switch tripped and reset during an active heating phase, causing the dishwasher to continue the program without heat from that point in the cycle. The switch is a safety device that cuts power to the heating element when it detects insufficient water pressure or circulation. The most frequent cause is excess foam from too much detergent, though low water fill and circulation problems can also trigger this code.

The dishwasher is generally safe to run after F52 because the machine completes the cycle rather than stopping entirely. However, the wash phase affected by the fault runs without heat, which means dishes may not be properly sanitized and wash performance will be reduced. It is advisable to identify and correct the underlying cause before running additional cycles.

If the problem is detergent-related or a dirty filter, the fix costs nothing beyond routine maintenance. If a component such as the heater pressure switch needs replacement, parts typically range from around 20 to 60 dollars depending on the model, with labor adding roughly 100 to 200 dollars if a technician is hired. A failing circulation pump is a more involved repair and can bring total costs into the range of 200 to 400 dollars or more.

In many cases, yes. Start by checking that you are using the correct amount of a dishwasher-specific detergent and that the rinse aid setting is not too high, as foam is the most common cause of F52. Also clean the sump filter and inspect the spray arms for blockages. If the error persists after addressing these items, a component-level inspection of the pressure switch or circulation pump may be needed, which is better handled by a technician.

Resetting the dishwasher will clear the displayed code and allow a new cycle to start, but it will not fix the root cause. If the condition that triggered F52, such as excess foam, low water, or a restricted filter, is still present, the fault will likely return during the next heating phase. Address the underlying cause before relying on a reset as a solution.