No air at registers

[abcde]

I am new to all this, please bear with me. I have York electric heat pump. The air blower located inside the house blew and had it replaced. Now blower is running but there is no air at registers any where in the house. The service man checked the rotation of motor is indeed in the right direction. He says this can be an issue with fire dampers. Is that true ?

[mattison]

If you have fire dampers it could but not to many homes have them.

I would have them make sure they put the right blower motor in and if he took the blower wheel out of the housing make sure he didn't somehow manage to put it in backwards.

The cups in the blower wheel should have the cupped part going in the direction the wheel is spinning toward the outlet of the blower housing.

I can't believe he left the job with no air flow after intalling a new motor. You should just call and talk to the owner nicely and have them send out a better tech to look at it. If you had airflow before and now with a new motor you don't he missed something.

[abcde]

There is a small screw above the motor along the shaft towards the vent, he removed the screw and held a lighter flame to the hole and air coming out of that blew the flame out. So I am guessing that air is flowing in the right direction. One thing, by house I meant actually a condo, sorry if it caused a confusion.
Thanks for the reply.

[Ed Imeduc]

With Matt here for sure Id get him back right now. Does it do any better if you turn the blower on at the tstat. can b e not the right rpm on the motor or he didnt hook it up to the speed it was before. Dont pay till its fixed. Call code and ask them if you have fire dampers? I dont see why the duct is all for one unit.

ED ;)

[scottg]

All the fire dampers that I have seen were for a room by room settng. That is to say that there is a damper for each room and the setting would need to be 140 degrees to activate at the damper whicw is at the grille. so you would need to have a firein each room. I would go back to the installation of the replacement motor. Somethingsounds fishy there.

[abcde]

The shaft above the motor did have a fire damper which was shut down.
Opened it and have air flowing through all the registers now. All the fire dampers at other registers are intact. The fact the motor broke down and aux heat coils kicked in must have raised the temp high enough since the heat was not going anywhere and hence must have shutdown the fire damper above the motor.
Thanks every one.