Safety key off - Ironman 220t Programmable Treadmill (225 HP)

here is replacement
https://www.walkingpad.com/products/safety-key-for-walkingpad

Hey Sharon,
Hope so you're doing fine, there is typically no separate fuse on the MCB (Main Circuit Board). The MCB itself is responsible for controlling the incline and belt functions of the treadmill. If the top board turns on but the incline and belt do not run, and the MCB is flashing a safety key error message, it suggests that the safety key might not be properly engaged or there could be an issue with the safety key sensor.
To troubleshoot the problem, make sure the safety key is securely inserted into its slot and properly aligned. Check for any visible damage or debris that might be obstructing the safety key sensor. If the issue persists, it is recommended to consult the treadmill's user manual or contact Horizon customer support for further assistance. They can provide specific troubleshooting steps or guide you through any potential repairs or replacements that may be necessary.

Hope so this will work for you!

Regards,
Bryce June
CEO & Founder of https://bbcorhitter.com/

Question moved from MISC.

I live in Toronto!

Try removing the key and reinsert it.

The KETTLER treadmill has an emergency stop mechanism for
your safety. Before starting your workout, fasten the cord of the
safety key to your clothing. If the treadmill has been shut down
by removing the safety key, restart it by reinserting the key. An
automatic restart of the treadmill belt does not occur. Further
instructions concerning the handling of the safety cut-out can be
found in the operating instructions for the training computer.

https://manuall.co.uk/kettler-toronto-treadmill/

..

the SAFETY key attaches to the console of the treadmill usually by a magnet and is linked to the users clothing so if they fall they pull the safety key off and the treadmill automatically stops. The treadmill will not work without the safety key in place

Check here for guidance on how replace or repair your safety key:
http://www.partsfortreadmill.com/parts-for-treadmill/treadmill-safety-key/
http://www.treadmillsrepair.co.uk/2014/08/treadmill-safety-key.html

First thing I'd try is just using any magnet. I'm sure that's all the key is normally. If that doesn't work, no you cannot use a treadmill without a key. It's a safety measure created by the company.
Here's the key for sale on amazon that goes to your treadmill.
http://www.amazon.com/Pro-Form-Treadmill-Safety-Key/dp/B002YP4KQE
Hope this helped!

Error Code: Replace Safety Key (SAFE)
Meaning: Safety key is not recognize
Diagnostic: Replace safety key
If problem persist replace upper display board
you should also try cleaning the area where you insert the key magnetic

horizon rct 7.6 , safety key off , replaced ,key.reed switch and board , still says safety key off ?? spoke to horizon several times and repair techs as well ,it can only be 1 of those 3 items , all switch & key tested good , must be a faulty new board ?? could it be anything else ??

I have a Weslo Candence treadmill and I too lost my safetly key and I recently folded up a leftover valentine's card from my child's kit box and to my surprise it worked. I just folded to the size of the key and inserted and the treadmill started up with no problem. YEAH!