I am renting a home that is 50 years old. It has recently turn cool, low 30s. If I turn the heating/air switch to heat and 70 + degrees. All I get is cool air coming out of the air vents. Can someone tell me what things I should do before calling heating specialist?

Hi I was hoping one of you out there could answer my question ? I have lived in my house for over a year now and pay my rent every month without fail!! But the landlord don`t seem to want to do repairs on the house what is concerning me the most is the fact the boiler and gas cooker and gas fire...