Chris N
New Member
I have a 14 years old Carrier Dual Stage furnace.
For the longest time, we used the most restricted air filter. About 3-4 years ago, the furnace start to short cycle (ie when the 2nd stage kicks in, it shuts down within a minute). Replacing with less restrictive filter helps.
This happens again about 4 months ago....so I am down to the least restricted filter.
My question is what could have cause this?.....I suspect the evaporator coil might be dirty causing restricted air flow. As it is hard to get to the coils, I want to know if there are any other things I should look into?
For the longest time, we used the most restricted air filter. About 3-4 years ago, the furnace start to short cycle (ie when the 2nd stage kicks in, it shuts down within a minute). Replacing with less restrictive filter helps.
This happens again about 4 months ago....so I am down to the least restricted filter.
My question is what could have cause this?.....I suspect the evaporator coil might be dirty causing restricted air flow. As it is hard to get to the coils, I want to know if there are any other things I should look into?