I have a "finished" room in my basement that is maybe 10' x 16'. It has a baseboard heater that is perhaps 10-12' running along one wall. My problem is that right now the room's temperature will not rise above 60 degrees. I'm asking for help in diagnosing why.
Specifically, I'm wondering how to know if my baseboard heater is malfunctioning.
Here are some possibly-helpful bits of info - please let me know what else would be useful.
- the rest of the basement is unfinished, and that baseboard heater is the only one on the basement zone
- the supply and return pipes into the baseboard heater are very hot to the touch, and I can feel some heat coming from the baseboard heater
- My zone valve control (a Taco ZVC403) has indicator lights that indicate that the thermostat is calling for heat and that the zone valve is fully open
- Previously, I have had that room as warm as 68 degrees (I don't recall trying to heat it warmer). I don't recall the last time I heated it above 60 degrees, but it may well have been before winter.
- The basement walls are uninsulated; two of the "finished" room's walls are these bare, uninsulated walls.
My theory is simply that because it's cold outside right now (I live in Maine), I am losing a lot of heat through the exterior walls (and to the rest of the basement), and 60 degrees happens to be the most that the small heater is capable of heating that room to. But I'd like to be able to rule out a malfunctioning baseboard.