My blower is constantly working. Why? It was turning it self on and off until I changed thermostat. Now gas cuts off and on as needed to regulate temperature but my blower never stops, even when I diconect thermostat. I am under impression that it may be relay but unit is build in 1987 so I need to know where can I find parts for unit this age.
Thanks in advance, looking forward to some good info... :confused:

If this problem cropped up right about the time you changed the thermostat, chances are there is a connection (no pun intended). Did you follow the installation instructions? Be honest...

I have disconected thermostat and blower still runs, I probably need limit or relay. Model # NUGG075DF01. Any suggestions?

Does furnace work?(fire up)except for the fact the blower runs all the time

Its really odd that the fan relay picked exactly the time you replaced the tstat to go bad

If unit has a mechanical fan/limit combo, it could be sticking on the fan off switch.

Is the tstat set on fan only or auto?
Just a thought, I`ve been called out to homes and this was all that was wrong

is the tstat set on fan only or auto?
just a thought,,I`ve been called out to homes and this was all that was wrong
Yep, had one today, and they were pretty upset with themselves.

Yep, had one today, and they were pretty upset with themselves.

And even more upset when the service call fee still has to be paid,, I feel bad about it but the expenses still are there

I didn't feel so bad, they were somewhat rude over the phone when I suggested they check that before I drove out there... good for their perspective on their personally assumed knowledge and worldliness, that had to be humbling...

Yep,, some folks deserve every penny they have to spend

Couldn't agree more!

I changed swich back and forward and no change with fan, fan only stops if I cut uf furnace braker or take blower cower off. I understand that unit is old but it has working just fine, I need something to regulate it. Fun limit or relay?