Bosch dishwashers have a reputation in Orlando kitchens for being quiet, thorough, and a little dramatic. When something goes wrong, they do not just stop. They flash a code at you, sometimes run the drain pump on a loop like a tiny sump, and refuse all further instructions. The two codes that generate most of our Bosch calls are E15 and E24, and they could not be more different in what they mean.
One of them says there is water where water should never be. The other says water cannot leave. Both are usually fixable, one of them often without parts, and both have a version that means stop and call. Here is the whole story, including the famous tilt trick for E15 and the brand-new-disposal mistake behind a surprising number of E24s.
Bosch error codes at a glance
| Code | What it means | Likely cause | What to do |
|---|---|---|---|
| E15 | Water detected in the base pan, leak protection active | A real leak, or one-time oversudsing from the wrong detergent | Dry the base pan, find the source; persistent E15 is a leak |
| E24 | Dishwasher cannot drain properly | Clogged filter, kinked hose, blocked air gap, disposal knockout plug still in place | Clean filter, check the hose path and disposal connection |
| E22 | Residual water after the cycle | Filter clogged with debris or grease | Pull and wash the filter assembly |
| E09 | Heating fault | Failed heating element or heater circuit | Needs a meter; book a visit |
E15: the flood switch found water in the basement
Every modern Bosch has a plastic base pan under the tub with a float switch sitting in it. If enough water collects in that pan, the float rises, the control locks the machine into a protective mode, and many models run the drain pump continuously to protect your floor. That is E15. It is not the dishwasher being broken so much as the dishwasher telling you it caught a leak before your kitchen floor did.
The question is where the water came from. Sometimes the answer is embarrassing and harmless: somebody ran out of dishwasher detergent and used a squirt of dish soap, the tub oversudsed, and foam found its way down into the pan. A one-time E15 after a suds incident is not a crisis. But repeated E15s mean water is getting into that pan on its own schedule, and that is a real leak, from a hose connection, a door seal, a pump housing, or the tub itself.
The E15 fix everyone asks about: yes, the tilt is real
The internet's favorite Bosch repair genuinely works for the one-off case. Kill power to the dishwasher at the breaker, pull it out from under the counter, and carefully tilt it forward to about 45 degrees over towels. The water trapped in the base pan runs out, the float drops, and the code clears. Let it dry, slide it back, restore power, and run a test cycle with proper detergent.
Here is the part the internet skips. The tilt empties the pan, but it does not answer the question of how the water got there. If E15 comes back within days or weeks, stop tilting and start treating it as a leak diagnosis, because the pan is doing exactly its job: catching a drip before it becomes warped flooring. A leak small enough to take two weeks to trip the float is still a leak, and Florida humidity plus a slow leak under a cabinet is how mold gets a head start. We wrote separately about dishwashers that leak onto the floor, and E15 is often that same story caught early.
E24: the drain code with a greatest-hits list
E24 means the machine tried to pump out and the water did not leave fast enough. The causes stack up in a predictable order, cheapest first.
Start at the filter. Bosch filters are a twist-out cylinder in the tub floor, and they catch everything your prep rinse missed. A filter matted with rice, seeds, and grease slows drainage enough to throw the code. Twist it out, wash the whole assembly under hot water with a brush, check the sump opening underneath for debris, and reseat it properly, since a badly seated filter can cause its own trouble.
Next, the drain hose. It needs a smooth run with a high loop under the counter, no kinks from being shoved against the cabinet back, and a clear connection at the sink end. If your drain hose ties into an air gap on the countertop, pop the chrome cap and clean it, because a gunked air gap backs the whole line up.
And then there is the classic. If your E24 showed up right after a new garbage disposal went in, the installer almost certainly forgot to punch out the knockout plug inside the disposal's dishwasher inlet. The dishwasher is pumping against a factory-sealed wall. Disconnect the hose at the disposal, look into the inlet, and if the plug is there, knock it out with a screwdriver and a tap, fish the slug out of the disposal, and reconnect. Five minutes, zero parts, and one of our favorite phone diagnoses because everyone gets to feel good about it except the installer.
If the filter is clean, the hose runs fair, and the disposal path is open, the remaining suspects are the drain pump itself and the check valve, and those are part-and-labor territory. A pump that hums without moving water, or runs loud and gravelly, has usually eaten a shard of glass or a fruit pit.
The reset, and when it is the whole fix
Bosch controls occasionally hold a code after the underlying condition is gone. After you have actually fixed something, clear the machine properly: press and hold the Start button for about three to five seconds on most models, or kill power at the breaker for a full minute. A code that returns immediately after a real reset is telling the truth. Believe it.
The Orlando hard water tax on Bosch machines
One local wrinkle worth knowing. Bosch dishwashers meter water precisely and dry with condensation instead of a heating element, which is part of why they are so quiet and gentle. It also means they feel Central Florida's hard water more than most brands. Scale films the spray arm nozzles and narrows them, mineral grit works into the fill valve, and the same white crust that clouds your glasses slowly builds inside the sump and around the float mechanism that triggers E15.
The counters are cheap. Keep the rinse aid topped up, run a dishwasher descaling product or citric acid cycle every few months, and set the built-in water softener if your model has one, since many Bosch machines do and almost nobody in Florida sets it. A machine that gets that treatment throws fewer phantom codes, cleans better, and keeps its valves alive years longer. Hard water is a whole subject on this blog for a reason, and your dishwasher sits on the front line of it.
What a Bosch dishwasher repair costs in Orlando
For real numbers, Yale Appliance's 2025 service data puts the average dishwasher repair at about $180, with most jobs between $140 and $400. Drain pumps and fill valves sit in the middle of that range, with the parts usually $30 to $80 at retail. Leak diagnoses vary more, because the fix can be a $15 hose clamp or a pump housing. The diagnostic at QLAMA is $90, waived when we do the repair, with a flat price quoted before work starts. Our dishwasher repair team in Orlando sees enough Bosch machines that the common parts ride on the truck.
When to call an Orlando tech
Call when E15 returns after a proper dry-out, because that is a live leak with a countdown attached. Call when E24 survives a clean filter, a fair hose, and a clear disposal path, since pumps and check valves need parts and know-how. And call first, before any DIY, if you see water on the kitchen floor, scorch marks, or a breaker that trips when the dishwasher runs. A dishwasher combines water and electricity in a metal box, and it has earned some respect.
QLAMA Appliance Repair services Orlando, Winter Park, Kissimmee, Sanford, Oviedo, Lake Nona, and the surrounding communities within roughly a 30-mile radius of Orlando, residential and commercial.
Common questions about Bosch E15 and E24 codes
What does E15 mean on a Bosch dishwasher?
E15 means the leak protection system found water in the base pan under the tub and locked the machine to protect your floor. The cause is either a one-time oversudsing event or a genuine leak. Draining the pan clears the code, but repeat E15s mean a real leak needs finding.
How do I clear the E15 code on my Bosch dishwasher?
Cut power at the breaker, pull the dishwasher out, and tilt it forward about 45 degrees over towels so the base pan drains and the float switch drops. Dry it, slide it back, restore power, and test. If the code returns within days or weeks, water is still getting in and it is time for a leak diagnosis.
What does E24 mean on a Bosch dishwasher?
E24 is a drain fault: the water is not leaving fast enough. Work through the causes in order: a dirty filter assembly, a kinked or badly routed drain hose, a clogged air gap, and, after a new garbage disposal install, a knockout plug that was never removed from the disposal inlet.
Why did E24 appear right after I installed a garbage disposal?
Almost certainly the knockout plug. New disposals ship with the dishwasher inlet sealed by a factory plug that must be punched out during installation. If it stays in, the dishwasher pumps against a wall and throws E24. Disconnect the hose, knock the plug out, retrieve it from the disposal, and reconnect.
Is E15 serious or can I just reset it?
Treat the first E15 as a warning and the second as a diagnosis. A single event after using the wrong soap is usually harmless once the pan is dried. Recurring E15 means a slow leak is filling the pan, and slow leaks under cabinets do quiet, expensive damage in Florida humidity. Do not just keep tilting it.
Get the quiet dishwasher back
A Bosch that flashes E15 or E24 is handing you a head start: it caught its own problem and told you which system to look at. Dry the pan or clean the drain path, reset it honestly, and if the code comes back, let us take it from there with the likely part already on the truck.
Book an appointment online or call us at 561-320-7695. The diagnostic is $90 and gets waived if we do the repair.