You can raise your maintenance issues at the hearing. The LTB can make an order to get the issue fixed.

Before the hearing, you should let your landlord know that you are going to raise these issues. You can do this in writing, or by talking to the landlord in person or by phone.

At the hearing, bring any people you want to use as witnesses plus three copies of any evidence (for example, receipts or pictures).

For more information, see the brochure Issues a Tenant Can Raise at a Hearing about a Landlord’s Application for Non-payment of Rent.

Tenants who have maintenance issues can also file a Tenant Application about Maintenance.

Source: www.sjto.gov.on.ca