Furnace is Bryant 383KAV042091 AGJA, series G 88BTU/HR
1) There is no cooling equipment, but a blue wire is connected to the "cooling" terminal on the control board. Does it have to be connected? If not, there in no third "park" terminal to attach it to, as the 2 existing ones are already taken.
2) For blower speed control, is the red wire DEFINITELY for the lowest speed? That's what it is on, and the register output is too fierce and barely warm. The other leads are yellow and black. So I figure, that the solution is slowing the blower, but how?
Is the following info relevant to this situation?
Check the furnace rating label - it will have a rated temperature rise for the furnace. Measure the return air temperature and then measure the supply air temperature 12" after the furnace (or after the A/C coil if you have air conditioning) with the furnace running in heat. Subtract the return air temperature from the supply air temperature. If the temperature difference is lower than the rated temperature rise then you have a problem with your limit. If it is higher than the rated temperature rise you have a problem with airflow.
Thanks in advance for any help.