Using repair and deduct for heat
California's "repair and deduct" law can let a tenant fix a serious problem like no heat and subtract the cost from rent in limited situations — but it has strict rules and limits, so it is easy to get wrong. Get advice before using it.
Repair and deduct generally applies only to conditions that make a home unlivable, requires giving the landlord notice and a reasonable time to fix the problem first, and caps how much you can deduct and how often you can use it. Acting too soon, deducting too much, or misjudging the situation can lead to an eviction case.
Because the rules are technical, it is worth talking to an attorney before you hire your own contractor and take money off the rent. Before you repair and deduct over heat, a free review can help you do it safely.
This is general information about California tenant rights, not legal advice. Every situation is different.