Assisting the parental units - boiler/wifi interference

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Scratching my head trying to work this out as a less-than-educated amateur, so hoping wiser heads can point me in the right direction.

Here's the setup, or at least the bits of kit I think may be relevant.

Sky Q, dish on outside wall, 2.4Ghz connection to main box on ground floor (rear living room) with 3 mini-boxes (front bedroom, kitchen, front sitting room)
Netgear RAXE300 wifi 6e router in upper bedroom. Each band is on a separate SSID
Worcester Bosch 4000 boiler with Comfort II RF controller. Boiler is in airing cupboard between the Sky dish and the router, so brick wall between it and the dish, cupboard wooden wall between it and the router
ICS EV charger outside front of property, probably 30' from the router with 3 layers of brick (2 internal, 1 external) between it and the router. It is on the 2.4Ghz band, but was on the 5Ghz band until recently.

Parents had the boiler installed in early July, no issues. The control panel was in "Off" until the weather got a bit colder and it was programmed with times and set to "Auto" at which point the EV charger dropped on and off the wifi like a yo-yo. Moving the charger to the 2.4 Ghz band seemed to settle it down for a while, but on top of that the Sky mini-boxes keep dropping off the network and the charger has once again started to misbehave.

Unplugging the RF control panel didn't appear to do much, the WB connectivity team suggested unplugging the RF key from the boiler as well but that seems to be solidly latched in and the last thing I want to do is break a brand new boiler by being heavy-handed.

So, my thoughts are this:

1) the boiler control panel is faulty. WB offered to replace that if the problem can be traced to that
2) the RF is interfering with the wifi. Would be odd for something operating in the 5 Mhz band to interfere with domestic wifi frequencies though, wouldn't it?
3) the router is dying/dodgy - the signal strength at the EV charger for 2.4 Ghz only reads as 65%. I'm tempted to upgrade the parents to a wifi 7 router anyway.
4) the EV charger is iffy

The annoying thing about the Sky boxes is that Sky will only let you use the 5 Ghz band if you have their router/broadband, which strikes me as incredibly petty.

Everything on a wired connection to the router is fine, the mobile phones/iPads etc are staying connected to the wifi with no problems, although I've occasionally noticed my work laptops (cheapest Dell models public money can buy :rolleyes:) struggle with connection. Before I lash out on a new router, anyone got any thoughts on this? Worcester Bosch were very helpful and pleasant to deal with, but part of me thinks their kit isn't the source of the problem, it's just exposed a problem that was already there.
 
If this is caused by the boiler, it should be easy to replicate. Have you turned the boiler off at the fused spur completely and, if so, does the issue go away? If it's a combi, you'll lose CH and DHW but you can always turn it back on. That will kill power to the transmitter for the controller and eliminate that as a cause.

The broadcast frequency of the RF controller, however, shouldn't interfere with the WiFi. Is your Netgear WiFi set to auto on the channel settings? This enables it to switch channels automatically based on interference. You may be experiencing interference from elsewhere, and the boiler is a coincidence.
 
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It's a combi, but the issue is that mum has stage 4 cancer and leaving the heating off for a decent diagnostic period is not the best idea.

The 2.4 Ghz band is set to Auto for Channel, the 5 Ghz and 6 Ghz don't appear to have that option. They have the same password but separate SSIDs, I haven't combined them into a single network.
 
It's a combi, but the issue is that mum has stage 4 cancer and leaving the heating off for a decent diagnostic period is not the best idea.

The 2.4 Ghz band is set to Auto for Channel, the 5 Ghz and 6 Ghz don't appear to have that option. They have the same password but separate SSIDs, I haven't combined them into a single network.
Ah, sorry to hear about your mother. Let's see if we can sort this another way then!

You could try splitting the SSIDs and see if improves things. Leave everything on 2.4 and put the 5 out on its own. Less throughout, but 2.4 has better range and stability.
 
I'll keep an eye out for a nice warm day I can use to test the connections with the boiler switched off altogether and see how the various peripherals behave. Dad seems to think that that the mini-boxes have been playing up for a while, possibly coinciding with the 6E router replacing the old wifi 5 one 18 months ago. First time I've had a Netgear router give me problems, but it could just be a duff unit.

Thanks ever so for the help :)
 
In my opinion, I would jump straight to replacing the WiFi kit, easiest way to diagnose and solve everything:

1. If the new kit is still suffering issues, then you know it's something in the house (Boiler). Can return kit or diganose further at this point for fault.
2. If it's not suffering issues, problem solved.
3. If whenever it's no longer needed, can be reused/repurposed elsewhere.

If you try to diagnose everything else first, you're going to be there a while whilst you go every one of them individually and may take time or not be suitable/possible (new boiler, warranty, time of day, etc)

My parents place just had an old combi replaced, also with the 4000 30kw version, and the engineer had issues with it constantly firing up out of the blue during the initial installation. Not sure what they did after as I went to assist to bleed the raditators in the rest of my parents place. But they made a call in to their company and spoke with someone who guided them to get that sorted out after. But, funnily enough, my own 5ghz (band 1) ran into issues shortly after. 5ghz Band 2 and 2.4Ghz that have been split out (prior) suffered no such issues, similar to yours.

So if @aaronyuri suggestion of splitting the wifi SSID's up doesn't help, just grab new kit.
 
Yeah, the wifi 7 standard is supposed to have some anti-interference gubbins, as far as I understand it so although they don't have much, if any, wifi 7 kit it might still be worth the upgrade.
 
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