Emerson 57T01-843 Blower Time Delay Relay

My Air Handler twv025b140a1 blow motor was turning on and off continuously. This fixed the problem.

Purshased two so I would have a backup, just in case. Perfect fit and easy to install!

direct replacement no issues.

Good part

My fan(only) would not stop running until this was replaced. Direct replacement for a TRANE TWG018A140B1.

Exactly what I wanted

I have a Trane heat pump, manufactured in 2008. Ive been having problems with the blower motor seemingly having a mind of its own, ie. turning off while the system is heating or cooling, causing indefinite running of the outdoor unit. To combat this, I set the blower to run continuous (ON position instead of AUTO) so that the system would never be running without the blower. This worked for a while, but not a very comfortable remedy since youre getting ambient temp air coming into the house between cycles. This is effectively air conditioning your house between cycles of heat during winter, and vice versa in summer. Eventually, this trick stopped working as sometimes the blower (in ON position) would still cut out, or sometimes not turn on at all. Replacing start run capacitors did nothing. Not being an HVAC tech, I started looking into getting a new unit, but then my dad recommended to try this relay first. It took me 2 minutes to swap it in and it FIXED the whole issue with my blower, just in time for an 18 degree night in Tennessee. Everything has been working perfectly since, and now I can move on to the next issue: finding a girlfriend.