Hotpoint E3 fault codewhat it means and how to fix it
Labelled a defrost sensor fault, but Hotpoint attach an oddly specific owner check to it: the drain pipe and the plumbing under your sink.
Take care
What E3 means
Hotpoint give E3 as a defrost sensor fault with the symptom that the compartment temperature in the fridge is incorrect, and then add a recommendation that does not obviously follow from the label: check the drain pipe and under sink plumbing for any blockages. It is worth doing rather than dismissing, and understanding why makes the whole defrost picture clearer. Every frost-free appliance melts frost off its evaporator periodically, and the water that produces has to go somewhere. It runs down a channel at the back of the compartment into a drain, then out to a tray above the compressor where the heat evaporates it. When that drain blocks, the water backs up, refreezes where it sits, and starts building a sheet of ice at the bottom of the compartment.
Some Hotpoint installations plumb the drain into the waste under the sink, which is why their advice reaches out to your kitchen plumbing rather than staying inside the appliance. So the code says sensor and the recommendation says drain because both end up producing the same picture: a defrost cycle that is not clearing properly and a fridge compartment that is too warm. The symptom Hotpoint publish is the one to recognise, and it is the same one that turns up under several codes in this category — the fridge gets warm while the freezer carries on working. That is what a blocked or failing defrost system looks like from the outside, because the cold has to travel further to reach the fridge compartment and ice in the wrong place stops it.
Beyond the drain check, this is an engineer job and Hotpoint say so. A defrost sensor is not an owner-replaceable part, and reaching it means stripping the back panel of the compartment, which is precisely where the refrigerant pipework runs. Hotpoint attach their own general safety line to any part replacement: make sure the appliance is unplugged from the mains before replacing any part. If your display shows E4 or E5 rather than E3, read this page for the picture but not for the fix. Hotpoint list E4 as a fridge defrost sensor fault and E5 as a freezer defrost sensor fault, each with the symptom that the compartment temperature is incorrect, and route both straight to an engineer. The drain and under sink check is attached to E3 alone, so on E4 or E5 there is nothing on their table for you to try, and the question is only whether the appliance is worth the visit.
What causes it
| Cause | What is actually happening | How likely |
|---|---|---|
| A blocked defrost drain | The check Hotpoint recommend. Meltwater that cannot get away refreezes where it sits and builds up, which produces both the ice and the warm compartment. | Common |
| The defrost sensor reading wrongly | The literal meaning of the code. A sensor that misreports the evaporator temperature makes the control board mismanage the defrost cycle. | Common |
| Blocked plumbing under the sink | Hotpoint name this specifically, which points at installations where the appliance drain runs into the kitchen waste rather than to an evaporation tray. | Occasional |
| Ice already built up on the evaporator | Once there is enough of it, a working defrost cycle cannot clear it within the time the appliance allows, so the fault persists even after the original cause is gone. | Occasional |
What to try yourself
Look in the bottom of the fridge compartment for standing water or a sheet of ice, and under the salad drawers. That is where a blocked drain shows first.
Find the drain hole at the back of the fridge compartment, usually a small opening in a channel at the bottom of the rear wall, and check it is clear.
Check the under sink plumbing for blockages, which is Hotpoint’s own recommendation for this code and points at installations where the appliance drains into the kitchen waste.
Do not poke anything hard or metal into the drain or the compartment wall.
The refrigerant pipework runs through the back of the compartment and, on any modern appliance, carries flammable isobutane. Something soft and flexible only, and gently.If the fridge is warm while the freezer is fine, and the drain is clear, book an engineer. That combination with this code points at the defrost system.
Unplug the appliance before anybody starts work on it. Hotpoint publish that instruction for any part replacement on their appliances.
Get a qualified refrigeration engineer to look at your Hotpoint E3
We do not pass enquiries to a repair firm, so there is no form here. When you book a qualified refrigeration engineer, tell them the make, the model and the exact code or message on the display, and ask whether they carry parts for this make — that is what turns one visit into a repair rather than a quote.
What it costs to fix
Typical repair cost
£0–£240
Time on site
1h 30m
Nothing if it is a blocked drain you can clear. A defrost sensor with labour if not — the part is inexpensive but the access means stripping the back of the compartment.
Typical UK prices including parts and labour, updated September 2026. Your quote may differ.
Own this appliance and had this code? . Nothing is published until a person has read it.
Related Hotpoint fault codes
- E9Get it checkedFreezer high temperature alarm, and the only Hotpoint fridge code with a genuine owner cause. Their published first suspect is a door left open.Related: same brand
- E1Get it checkedA temperature sensor fault. Hotpoint route these straight to an engineer, and the reason is consistent across the whole industry rather than unhelpfulness.Related: same brand
- E0Get it checkedIce maker fault, and one of the two codes Hotpoint lead their own page with. It only applies if your appliance actually has one.Related: same brand
Own a Hotpoint fridge or freezer? Save it and its codes come first next time.
Related guides
Common questions about Hotpoint E3
Why does a defrost sensor fault mention my sink?
Because on some installations the appliance drain runs into the kitchen waste, and a blockage there backs water up into the fridge. Hotpoint recommend checking the drain pipe and under sink plumbing under this code specifically, and although it sits under a sensor label the two produce the same symptom — a defrost cycle that is not clearing and a warm fridge compartment.
My fridge is warm but the freezer is fine. Is that this?
It is the classic picture, and Hotpoint publish exactly that symptom for this code. The fridge is further from where the cold is made, so when ice blocks the path it warms first while the freezer carries on.
Can I clear the drain myself?
Gently, and with nothing hard. A soft flexible tube or warm water poured slowly is the limit. The pipework in the compartment walls carries flammable refrigerant, so anything metal or pointed is exactly what manufacturers warn against.
I have E4 or E5, not E3. Is it the same thing?
Related but not the same. Hotpoint publish E4 as a fridge defrost sensor fault and E5 as a freezer defrost sensor fault, both with the symptom that the compartment temperature is incorrect, and both go straight to an engineer. The drain and under sink check on this page is the advice Hotpoint attach to E3 only. It does no harm to look for standing water, but on E4 or E5 their table gives you nothing to try.
Technical review
Not reviewed by an engineer
No engineer has read this page. Severity follows what the manufacturer publishes, and we would rather tell you that than let a byline imply a sign-off.
Sources and how we verified this
We establish the facts from the sources below and then write the explanation ourselves. We do not copy manufacturer wording and we do not host their manuals.
- Manufacturer support portal
This page has not been reviewed by an engineer, and we would rather tell you that than imply otherwise. The severity rating follows what the manufacturer publishes: where they say isolate the appliance and call someone, so do we.