Upgraded to a Higher MERV-Rated Filter and Now Your Carrier Furnace is Throwing 33 or 13 Error Codes? Due to COVID-19, many people are taking precautions to better their in-home air quality. The big problem however, is a higher MERV rated filter can restrict the air flow going over the furnace's heat exchanger and cause the furnace to go off on high limit. On Carrier, …
read more