Code f7 showing & chair won't lift

Question edited for clarity. The maker appear to be Harmar, not 'Harman'.

$200 on eBay plus a link to the maker and parts suppliers.

https://www.google.com/search?q=harmar+al600-12+chair+lift+circuit+board+replacement

..

Well it _sounds_ like the actuator has failed, but that is a big chunk of money to spend on a guess. Contact the maker.

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You need to install 2 9v batteries. Once you attach, unplug the chair and plug back in. The code will disappear.

This store carries the hand controls and other parts for your chair. liftchairsrus.com

the motors may have won brushes or the brakes are hanging up causing high battery usage

I’m happy to assist further over the phone at https://www.6ya.com/expert/bill_bcbb89783b08c489

With Golden Technologies chairs, there is a self diagnostic system. There are LED lights at the transformer and the hand control. If you do have have lights at the transformer, it may be a power issue or a bad transformer. If you have lights at the transformer but not the hand control, it is the hand control. Since you state you ahve lights on the hand control, it is probably a motor issue.

The best thing you can do is call the store which sold you the chair or call Golden directly at 1-800-624-6374. While they do not sell directly to the public, they can point you to a local dealer who can help with the repair.

Hi,

Well, F7 error code occures due to
A = Function pad button stuck or 
B = Bad clock Unstick button or
Replace Electronic Range Control (ERC)

Replace the ERC there are ten screws 3 on each side and 4 on the control leave the hex screws alone all you need is a phillip screwdriver.
REMEMBER TO SHUT OFF THE POWER FIRST lift and fold out the control panel remove the ribbon cable and remove the four screws that hold the control board . replace control panel in reverse order.

Thanks

Yes, jump, short, somehow bypass the switch and see if the chair moves. In 4 of 5 cases, I have had to replace the switch. Its the only part I carry with for "spares". Its an easy fix, and a lot cheaper than replacingt the whole hand control.