So per the spec sheet -- the "Full Load Amps" for that model could actually be up to 5.2A per the bottom portion of the 90-14 column second from the right on pa

So per the spec sheet -- the "Full Load Amps" for that model could actually be up to 5.2A per the bottom portion of the 90-14 column second from the right on page 5: https://d1049ui2fjityy.cloudfront.net/userfiles/inriver/documents/dp/31/-t/product%20data%20-%2058st-13pd.pdf https://d1049ui2fjityy.cloudfront.net/userfiles/inriver/docu... That motor has a switch so it could be in 3 different settings -- As shipped, the blower motor speed is set to be faster for AC (more draw in the summer) to prevent the coils from icing over, and then it's shipped to be the slowest fan speed while in heating mode, but it is possible that your installer changed that. If indeed it is in the "slow" speed for heat, then 2.5A would be about right.