Yes, but only with permission of the tenant.
Note: taking your handyman to do a quick check-up on plumbing/ toilets / caulking etc. is not a bad idea. You must inform the tenant of the visit and provide 24-hour notice.
For more FAQs, visit the Housing Law section of Steps to Justice site. Q&As on the site are organized in “steps” that lead people through common scenarios. Community Legal Education Ontario created the website together with justice sector partners, including the Landlord and Tenant Board.