Wow. Sorry for the late reply, guys. I'd thought that I responded, but it looks like I forgot the tab open without posting the message.
Either way, just a quick update. Thanks to adjusterjack's recommendation, I had two different HVAC companies come out and provide free evaluations a few days back. One of the guys that came out actually fixed the problem without even charging me for it. Was obviously very pleased with that. The problem was that the valve that was connected to the pressure switch was clogged somehow - a quick blow within that tube dislodged whatever was in there that was blocking the pressure from going through and now it's back to normal. So thanks again to AJ for the recommendation and to everyone else for your help as well. Can't thank you all enough for that.
Is the unit actually running and just not putting out hot air? It sounds to me like the ducting and/or filter may need cleaning/repair/replacing.
It was both running and putting out hot air. The problem was that it wouldn't stay on long enough to heat the apartment up to the set temperature. The issue was with the pressure switch valve. It was clogged. That's all resolved. For now, anyway.
with out removing the ring cover it may well be worth a try using a narrow slit plastic crack and crevice tool for your vacuum cleaner hose and move it around the outer edges incase a dust bunny formed and needs to be sucked out. Honey well rounds all though older normally work for decades with out a problem. If all else fails consider calling in your city building inspections inspector , even if your paying your own heat you should be able to set it higher and get a result (unless this thermostat is a conservation model which could be pre set to go no higher than 72 ( { ive installed those long ago in one of my properties I used to have } )
Same culprits, but these bunnies were lodged within the pressure switch valve. All's good for now. Thanks, anyway, for your recommendation. I appreciate it.
What you are describing is what happened when the blower/fan started going out on my natural gas furnace. Furnace/burners would fire up then go off again when blower didn't turn on after a minute, so house didn't heat up to setting on thermostat.
Also, if older furnace, maybe not well cared for you need to have a carbon monoxide monitor, if you don't have one (I think it's code for rentals where I'm from, Minnesota) especially since furnace is acting up. Get a monitor tonight before you go to sleep tonight. And, they don't last forever, should be replaced for accurate monitoring.
As for free inspection, not many do that. Usually a service call fee but is waved if they do repair or replace furnace.
Thanks. I'll look into that. If it's a condo, would I speak to the HOA or the landlord?
As for the inspection, yea', the first company I spoke with pretty much said the same, but when I declined, she eventually wound up calling me back and setting up the free inspection.
When courts (and I) read a statute it's first analyzed by the common dictionary meanings of words. I read "throughout" the way it is defined by Merriam-Webster:
https://www.merriam-webster.com/dictionary/throughout
If you average all the rooms and the average temperature is above the legal limit, he's covered by the law.
Got it. Thanks again.