The first cycle ran without hot water. Check the hot tap, hose, pressure and strainer.
Model compatibility: Bosch reuses codes across series and model years, so E:93 may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.
Plain language
What this code means
Hot water was not connected or available; the code shows at the end of the first cycle without it.
In the error table of the WAT28400UC Use and Care Manual, E:93 applies to washers hooked up to both hot and cold water. It indicates that a cycle ran with no hot water arriving.
Timing of the code
The display shows it at the end of the first cycle that ran without hot water.
Later cycles do not show it again, even if hot water is still missing.
A second cycle with hot water resets it.
A washer that showed E:93 one time and then fell quiet may not have fixed itself. It may just have stopped reporting.
What the manual says to check
Hot tap closed: open it.
Hot supply hose kinked or pinched shut: straighten the kink, and replace a damaged hose.
Low hot water pressure: remove the cause.
Clogged strainer in the supply hose: clean the strainers there. On hot-water appliances, both hot and cold hoses need connecting.
The manual color-codes the hoses: red means hot and blue means cold. It is worth ruling out a swap made at installation. Steps for cleaning strainers are in the maintenance section of the same manual.
Hot water caution
If the household hot water system has sat unused for two weeks or longer, the manual says that hydrogen gas, which is explosive, may have collected. Before running the washer, open every hot faucet for several minutes to let it out, without smoking or naked flames close by. Keep that in mind if E:93 appeared after you had been away.
Related codes
H9E with tap icon: the support-page code that names the same hot supply causes.
E:92-01: pressure or inlet filters, with strainer-cleaning instructions in full.
E19 / F19: the washer’s own heating took too long, which differs from hot water not arriving.
Washer hookup and repair in Los Angeles
When the hot side is fine and E:93 comes back, call (310) 879-1577 about a Bosch washer in Los Angeles. Keep the E-Nr. and FD numbers from the rating plate at hand; the plate is inside the door or on the back. See also washer repair.
Important safety warning. Do not attempt repairs involving electrical components, gas, water lines, refrigerant or sealed systems. Unplug the appliance if it is safe to reach the outlet, and leave internal diagnostics to a qualified technician.
Seeing this code on your Bosch appliance?
Book a specialist visit for a clear estimate and approval before any repair.
