Is jacking the t-stat a quick fix you found on a forum like this? Keep it up and you'll soon be asking why it no longer cool's.

Just kind of a troubleshooting thing to give more information to the tech. Do you think it could still be a relay?

So i now have a nest, but it did the exact same thing with my Honeywell Tstat and the old white rogders

Also if i agut off the system with the switch and turn it back on the fan still runs

Shut

Sorry more infobro: i have an upstairs and downstairs unit downstairs works fine. same units same tstats

Can you turn the fan on and off from the thermostat?

Went into the attic and found the relay. tapped on it and off went the fan. pn essex 134-10103-333A replacement shows rodgers 90-370. hope that is correct. ordered one for tomorrow. thanks for all the help.

"Customers who viewed this item also viewed" doesn't necessarily mean it is a "replacement.

EDIT: Seems it may well work. "The replacement relay works for my old White Rodgers 134-10103-333A. Only difference is 5 vs 6 pin. Just study the diagram and you're good to go."

Ya i read that exact commentmy, hoping it works.