Landlord Won't Fix landlord won't fix broken heating — Options?

I've been trying to resolve this on my own but I'm stuck.

landlord won't fix broken heating. I've been dealing with this for about 10 months now and the situation isn't improving.

I have been in this property for 3 years. My monthly rent is $1,289. I have a written lease.

Should I hire a lawyer for this or try to handle it myself?

Following this thread — following

I went through almost teh exact same thing.

The #1 mistake I see here is hiring an attorney to send the initial letter. I'd recommend being patient with the process instead.