The house is 1440 sq ft. and a 3 ton package unit was what the builders installed.
In 2017 the AC was replaced with a Day/Night 3 ton unit. I didn't move to AZ until 2019 at which time I began making sure the filters were changed (rental property) esp. during the summer months.
Last summer the AC stopped working. The AC vendor who came out wrote on the invoice:
After unit ran for 20 minutes it shut off. Found that the outdoor fan motor was not coming on. Run cap. checked out good. Changed 1/4 hp 1075 rpm outdoor fan motor with new run cap.
Unit came on with no problems.
Recently, I got a hold of an AC guy who has been in the business for 30 years. He told me the fan motor shouldn't have gone bad.
I had him come over and inspect the roof top unit. He said the evaporator coils were dirty and he cleaned them. I asked could the dirty coils have caused the AC to stop running and he said it's unlikely. He went on to explain the ductwork is too small for the 14 seer unit. He then recommended I replace the 12 in. ductwork with 20 in. which will improve the airflow.
Not sure what to believe.
Thoughts?
In 2017 the AC was replaced with a Day/Night 3 ton unit. I didn't move to AZ until 2019 at which time I began making sure the filters were changed (rental property) esp. during the summer months.
Last summer the AC stopped working. The AC vendor who came out wrote on the invoice:
After unit ran for 20 minutes it shut off. Found that the outdoor fan motor was not coming on. Run cap. checked out good. Changed 1/4 hp 1075 rpm outdoor fan motor with new run cap.
Unit came on with no problems.
Recently, I got a hold of an AC guy who has been in the business for 30 years. He told me the fan motor shouldn't have gone bad.
I had him come over and inspect the roof top unit. He said the evaporator coils were dirty and he cleaned them. I asked could the dirty coils have caused the AC to stop running and he said it's unlikely. He went on to explain the ductwork is too small for the 14 seer unit. He then recommended I replace the 12 in. ductwork with 20 in. which will improve the airflow.
Not sure what to believe.
Thoughts?
source https://hvac-talk.com/vbb/showthread.php?2226167-Fairly-new-AC-stops-working&goto=newpost
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