My Aerus Guardian Ultra temperature light comes on

Michael, try swapping out the HEPA exhaust filter from your Aerus Guardian Ultra with the electrostatic exhaust filter from the Aerus Classic. Huskyvacs has a good point, the increased resistance to airflow that the HEPA filter has might trap the hot air just long enough that it causes the overheat sensor to believe the vacuum is overheating. The electrostatic filter material used in the Classic's filter should have much less resistance to airflow, while still capturing the carbon dust from the motor.

I personally have never liked the HEPA Filter used in the Guardian Ultra - the quality of the filter paper used just seems cheap, and not as good as other HEPA Filters from other brands, like Miele. If you're concerned about the vacuum not filtering as well, just use HEPA Cloth Electrolux C bags and change the electrostatic filter more frequently than Aerus recommends - maybe every third bag change instead of six. If you use the HEPA bags, all the electrostatic filter really is capturing at that point is carbon dust anyways.


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Post# 463092 5/11/2023 at 18:50 (342 days old) by MichaelT (Phoenix AZ)
Checkrate/Likes Hi guys. I have an Aerus Guardian Ultra vacuum. I've had it a couple of months with no issues. Recently I was using it and the 'Aerus' light went off and the 'temperature' icon lit up. The machine did not shut off and I had only been using it for a short time. I changed the bag (it was pretty full) and now it's doing it again. I don't believe the vacuum is overheated as it was on only for a short time. Is this an issue with these vacuums? I took it to my vacuum repair guy who cleaned it and serviced it and could find nothing wrong. Any suggestions? My next call will be to an Aerus store. My owner's manual says the machine should shut off if it overheats. I'm thinking this is an electronic issue with the icon. Has anyone else had an issue like this? Thanks.

Post# 463097 , Reply# 1 5/12/2023 at 03:39 (342 days old) by huskyvacs (Gnaw Bone, Indiana)
Checkrate/Likes Did you try running it around with the filter removed and seeing if the problem occurs still? It might be the filter is trapping extra heat near the thermostat and fooling it into thinking that its overheating (I'm not sure where they put the thermostat wire). I have the Electrolux Guardian (different vacuum) and the filter box on it overheats the vacuum enormously. I tried a filter box with a different filter type in it and it helped cut down on the trapped heat. The old one looked like it was original to the vacuum, totally loaded with carbon dust.

Post# 463103 , Reply# 2 5/12/2023 at 09:46 (342 days old) by MichaelT (Phoenix AZ)
Checkrate/Likes Thank you, huskyvacs. That's a good idea. I didn't think of the filter being a problem. I'll try it.

Post# 463117 , Reply# 3 5/13/2023 at 00:30 (341 days old) by kirbylux77 (London, Ontario, Canada)
Checkrate/Likes Michael, try swapping out the HEPA exhaust filter from your Aerus Guardian Ultra with the electrostatic exhaust filter from the Aerus Classic. Huskyvacs has a good point, the increased resistance to airflow that the HEPA filter has might trap the hot air just long enough that it causes the overheat sensor to believe the vacuum is overheating. The electrostatic filter material used in the Classic's filter should have much less resistance to airflow, while still capturing the carbon dust from the motor. I personally have never liked the HEPA Filter used in the Guardian Ultra - the quality of the filter paper used just seems cheap, and not as good as other HEPA Filters from other brands, like Miele. If you're concerned about the vacuum not filtering as well, just use HEPA Cloth Electrolux C bags and change the electrostatic filter more frequently than Aerus recommends - maybe every third bag change instead of six. If you use the HEPA bags, all the electrostatic filter really is capturing at that point is carbon dust anyways.