thanks for suggestion. I replaced it with the same transformer previously installed. the main issue is why it worked for only a few days and then burns out?
the 24vac transformer in my inside unit of A/C system was burned out 3 times in this winter. one month ago, the unit did not work, no heating, no blowing. we found out the transformer burned out and replaced it. one week ago, burned out and replaced it again. yesterday (worked for 5 days) it was...