Panasonic Coolingwhat it means
Nothing is wrong. Panasonic publish this one plainly: the fan is clearing heat off the electronics, and the word goes away when it stops.
Before you start
What this means
A Panasonic microwave that says Cooling is telling you what it is doing rather than reporting a problem, and Panasonic say so in as many words: this indicates the fan is operating to cool the electric components, the word will disappear after the fan stops, and this is normal operation. It appears most on their combination and multi-oven models, because those reach genuine oven temperatures and have more to cool down. The reason it is worth a page is that the behaviour it produces looks like a fault. The appliance carries on making noise after you have finished with it and taken the food out, which is the classic pattern people read as a machine that will not switch off.
Panasonic’s UK combination manuals answer that one in their own questions-and-answers section: after using the oven the fan motor may rotate to cool the electrical components, this is normal, and you can continue using the oven at this time. So it is not a malfunction, there is nothing to reset, and it does not stop you cooking. The message that does stop you — from setting an automatic programme, not from cooking manually — is HOT, which has its own page. It is also worth knowing what a run-on fan is doing, because it makes it easier to leave alone.
The electronics and the magnetron sit in a metal box next to a cavity that has just been hot, and the heat continues to move outwards after the cooking has stopped. Clearing it is what protects the parts that would otherwise be the expensive fault on this appliance. The one thing not to do is pull the plug to shut the noise up: that stops the fan doing the job it started, and it is the only way to turn a normal display into a real problem.
What causes it
| Cause | What is actually happening | How likely |
|---|---|---|
| Normal post-cooking cooling | Panasonic describe it as normal operation, with the word disappearing once the fan has stopped running. | Common |
| A high-temperature programme has just finished | Combination and convection use leaves far more heat in the cavity than a short microwave run, so the fan runs longer. | Common |
| Ventilation openings restricted | Blocked vents make the fan run longer than it needs to, because the heat it is moving has nowhere to go. | Occasional |
What to try yourself
Leave it alone. Panasonic’s own answer is that the word disappears once the fan stops, and there is nothing to clear.
If you need to cook something immediately, go ahead. Panasonic’s UK manuals say you can continue using the oven while the fan runs on; only an automatic sensor programme is refused while the cavity is hot, and that shows HOT rather than Cooling.
Check the vents while you wait. There should be clear space around the appliance, and on a built-in model the housing vents should not be blocked by packaging or a tea towel.
Do not unplug it to stop the noise. That interrupts the cooling of the parts you least want to replace on this appliance.
If the fan runs for hours rather than minutes, or runs continuously from cold with the oven idle, that is worth a service call — but it is a different situation from this display.
Get a qualified appliance engineer to look at your Panasonic microwave
We do not pass enquiries to a repair firm, so there is no form here. When you book a qualified appliance 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
Time on site
5 minutes
Nothing. This is the appliance describing normal operation, in Panasonic’s own words.
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 Panasonic fault codes
- HOTUsually simple to fixThe cavity is still too warm from the last thing you cooked for an automatic programme. Manual cooking still works, and opening the door speeds it up.Related: overheating and cooling
- U50Usually simple to fixAn overheat message with an unusual twist: on Panasonic multi-ovens the room being warm can cause it, not just the cooking you just did.Related: overheating and cooling
- H97Get it checkedAn inverter or magnetron fault — and a counter. Panasonic state three H97 events disable the oven permanently, even after the faulty part has been replaced.Related: same brand
- H95Get it checkedPanasonic’s UK support answer puts H95 on the inverter circuit; their service manuals decline to separate it from H97, H98 and H99 at all.Related: same brand
- DUsually simple to fixDemo mode. The appliance lights up, counts down and appears to work while making no microwaves at all, and it survives being delivered to you.Related: same brand
- H99Get it checkedThe catch-all. Panasonic UK describe H99 as a general code for a problem with no code of its own; their service manuals file it with the magnetron.Related: same brand
Own a Panasonic microwave? Save it and its codes come first next time.
Related guides
Common questions
How long should it run for?
Panasonic do not publish a time for the Cooling display, so we are not going to invent one. What they publish is the behaviour: the word goes when the fan stops. Minutes after a short microwave run, considerably longer after convection or combination cooking, is the pattern to expect; the one figure they do give is for the related HOT message on the NN-CS89, where the fan cools the cavity within ten to fifteen minutes.
Can I use the microwave while it says Cooling?
Yes. Panasonic’s UK combination manual answers this directly: after using the oven the fan motor may rotate to cool the electrical components, this is normal, and you can continue using the oven at this time. What it will refuse is an automatic sensor programme while the cavity is hot, and that arrives as HOT rather than Cooling.
Is a fan that never stops the same thing?
No, and that distinction is the useful one here. A fan that runs on after cooking and then stops is this display. A fan that runs constantly regardless of use, or from cold, is not, and is worth having looked at.
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
- Manufacturer technical and service documentation
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.