My Sebo hoover trips the house mains sockets every time I switch it on, yet doesn't trip the kitchen mains. Have replaced filters/bag to reduce load but still no good. What should I be investigating in the hoover? Thanks

http://www.searspartsdirect.com/partsdirect/user-manuals/uh30010com-hoover-parts-vacuum-manual
WARNING: TO REDUCE RISK OF PERSONAL INJURY - UNPLUG CLEANER BEFORE SERVICING
PROBLEM POSSIBLE REASON POSSIBLE SOLUTION

2. Blown fuse or tripped breaker.
4. Thermal protector activated. (power
light is flashing)
1. Disposable bag is full. ("Check Bag"
indicator illumJnated red)
1. Disposable bag not installed correctly.
3. Brushroll is worn out.

2. Check fuse or breaker in home. Replace fuse/reset breaker.
4. Turn the cleaner off and disconnect it from the electrical
outlet. Then allow cleaner to cool for 30 minutes. If the
thermal protector continues to activate see Needs Service
solution #5.
1. Replace disposable bag - Pg. 9.
1. Review disposable bag removal and replacement - Pg. 9.
3. Replace brushroll - Pg. 10.

Turn the cleaner off and disconnect it from the electrical
outlet. Then allow cleaner to cool for 30 minutes. If the
thermal protector continues to activate see Needs Service

Is there a reset switch. Most vacuums have one some where near the bottom brush, to protect the vacuum from overload. If the vacuum tripped, the vacuum will not work until you've pressed the reset switch. If you can't find one, pls check manual.

Check the main "kitchen roll" filter isn't clogged which is on the left hand side of the bag when the bin door is opened. There could be a clog, either behind the pick out metal grid below the filter roll, or the roll filter requires to be replaced. Can you add more info about the squeaking though? Is it a high pitched squeal all of the time or just intermittent and where it seems to be coming from - it could be excess air escaping from a pierced hose or a drive belt issue.

Is it a Sebo , or is it a Hoover. It can't be both . "losing power" ??? Motor comes on and off ? or stops picking up ? Be more specific please.

Your hoover has a thermal protector that shuts power to the motor off for 30 mminutes if it trips. Tripping of the thermal protector it typically caused by an obstruction of some sort, there are several locations to check. First, remove the bagless filter and look for a rectangular plastic object centered under where the canister was. This "final fillter" is often overlooked and can be washed in your kitchen sink. Let dry completely before using. Other things to look at are on the big plastic filter inside the canister, make sure the holes arent clogged with dirt, this also can be washed in your sink. Of course check the lines from just behind the brush all the way to the filter for clogs. If all else fails, take it and your warranty if still good to an authorized service center to have it serviced... I've noticed on this model, if the thermal protector trips too many times, it seeems to be more prone to trip to the point that it doesn't matter if theres a clog or not anymore. This is how I found out about this problem, as I work for a hotel using these (and these are not designed to be commercial grade). They cost like $50 to service this $80 vaccume so, being that the warranty was void for using them commercially, and the cost of the servicing, I simply bypassed the thermal protector and make it a point to completely clean them 1-2 times a weeek till we can get a more commercial model.

If no burning or smelling, maybe nothing to do with motor, and if caused by the safety cut-out, it will need about an hour to cool down, and then check filter, bag, and drop coin through hose, pipes and the floor tool, to check for blockages and to stop it running hot. Damaged cable, worn carbon brushes, broken electrical rewind electrical contacts or even the printed circuit board (later models) are the most likely causes.

There could be numerous reasons for this. What I would try in this order to help troubleshoot is this:

1. If you wiggle the power cord near where it inserts into the vacuum cleaner itself, does the vacuum turn on and off constantly? If so, you have a damaged cord or loose connections that need to be fixed.
2. Has the bag been emptied, and if the vacuum has a filter element, has this been cleaned? Vacuums may cutout if they get too hot. A vacuum can overheat if either the bag is full, the filter is blocked, or there are other obstructions to airflow, which cause the motor to work harder and draw more voltage, resulting in more heat. It may have a thermal cutoff which is tripping constantly. Solution is to ensure bag is not full, or less than 3/4 full, any air filters are cleaned and check for any other obstructions in the air flow paths.
3. Ensure the power supply is adequate for the vacuum. Try running it without long extension cords if you have been using those.
4. Check and clean the switch. Sticky or dust contacts on switches can cause variable cycling (cutting out and restarting).

Hope that helps!

To replace the switch on the Hoover U6437-900 do the following:
Unplug the vacuum from the wall socket. Remove the bag door from the front of the vacuum. Just above the bag door you will see two screws that hold on the front portion of the section that holds your tools. Remove the two screws and then the front cover, you may want to revove the tools, 3 in total, to make sure there are no other screws hold the front cover in place. Behind the front cover you will find the on/off switch to remove and replace. Once the switch is replaced, test the vacuum to make sure it comes on, before you reasemble it. There is a plastic rod that comes down from the handle that trips the switch and moves it to the on / off position.

It seems I'm the only Sebo expert contributing to this site at the moment, and I'll be glad to help you but I need more information. What do you mean by "tripped out"? Do you mean it just stopped working, or what? Do any of the lights come on, or does the machine seem to be completely dead? How old is it (roughly)? What is the condition of the flex (especially where it goes in to the plug, and where it goes in to the rubber grommet on the handle)? Is the rubber grommet damaged at all? Any other damage anywhere?
The answer to your question is "no", there is no internal trip to reset. The machine will only cut out if it gets too hot (because there's a blockage somewhere) and it will reset itself when it cools sufficiently.

Sounds more likely to be the switch than the motor, especially if it is the model with the top switch rather than the side "rocker" switch. If you are in the UK, speak to the technical people at www.a1cleaningsupplies.co.uk they can post a replacement. Otherwise outside or even within the UK you can contact the manufacturers technical people. Website is www.numatic.com