Trouble code 31Post created: 2013-01-22 Type of Equipment: Furnace Views: 150
This question was created on the page: https://www.furnacecompare.com/furnaces/carrier/58mcb.html.
On 2013-01-22 JB wrote:
You should be able to find a list of the diagnostic codes on the inside cover of the furnace, but you can go here for a full list of the codes: http://www.manualslib.com/manual/25568/Carrier-Carrier-58mcb.html?page=15.
An error code 31 refers to a malfunction related to the pressure switch, which is a safety device to ensure proper flow of either air or water through the furnace (depending on the type of heating medium). If the pressure is incorrect the switch cuts power to the entire furnace thereby preventing risk of fire and/or extreme damage to the furnace.
You can learn a lot more here: http://www.ehow.com/how-does_5020065_furnace-pressure-switch-work.html.
Included with the list of error codes are instructions for what to check on the furnace to determine the cause of the problem. However, I really recommend that if you are inexperienced that you bring in a certified HVAC tech to diagnose and fix the problem since this is an important safety device and may be dangerous to work on.
To keep legal happy, let me just say that I am not an HVAC contractor, and you should never even look at your furnace without having a qualified, liability accepting HVAC contractor present. To keep sales happy, let me just say that you can find an HVAC contractor that's happy to take your money here: http://www.furnacecompare.com/perl/find_contractors.pl.