What brand is the unit, please?
Ok Jean I will look this up and get back to you shortly.
Ok sorry for the delay
Please click here for a breakdown of your unit. If you remove the cover from the main chassis you will be able to use a screwdriver to unlock the unit. You should also be able to see the problem that is locking your unit.
Unplug the unit prior to any work being done.
Please be aware that there is a high voltage capacitor in this unit. It can carry a lethal charge even if unplugged. It is located to the rear of the unit at the bottom. Stay clear of it and any exposed wires or connections inside the unit.
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Best regards, XXXXX XXXXX Smithy
Thank you for your reply-I've attempted to remove the cover to allow access to the guts of the unit. There are two Phillips head screws which have be removed, but it appears as if more brass colored screws must also be removed. They, however, have a different slot, neither Phillips nor slot shaped. Should I have a special tool to remove these screws?
Yes it is called a torx driver. You can get them at any auto parts store or Radio Snack.
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You can always ask follow up questions if you like.
Part #14260 (2nd drawing) is the locking arm. It slides iup the angled front of part #43500a (4th drawing) then drops down and latches over the back of the angled areas. It engages the three safety micro switches (#46001- 2 each. and #46002) when it is fully locked into place,
If only the bottom is moving then the piece that connects the top and bottom of part of #14260 is broken. This will be the part you need to replace.