After paying the property fee, is there a maintenance fee for repairing things?

That depends on where you fix it and whether you have insurance.

The property is responsible for the maintenance of public areas, that is to say, if you are repairing the parts for your own use, the equipment and facilities that are not within the warranty scope should be coordinated with the developer for your maintenance. If you install or repair the insured equipment and facilities yourself, you need to charge a certain fee, which is generally material fee+labor fee. Of course, some property services (fees) are relatively high, and labor fees may not be charged, but materials fees must be charged.

If it is a public part, there is no charge.

I hope the above can help you.