If heating is included in the lease, when can a landlord turn off the heat for the year?
Workers' Compensation Lawyer
If your apartment is too cold, record the temperature in your apartment three times a day for a week. If these recordings show that your apartment is too cold, send your landlord a letter stating that he/she is violating the Chicago Municipal Code and must increase the temperature in your apartment. If he/she doesn’t comply with this demand, call the City’s Heat Hotline at 312/744-5000. Also look at metropolitan tenants organization which has many answers to questions like this.