My carrier weathermaker sx is running but blower is not kicking in so no heat is blowing out. What would you suggest?

If the blower turns noisy check for any unbalanced like dirty blower, worn out blower bearings, worn out rubber mountings, loose bolts and nuts, or damaged v belts. These are the reasons making the blower noisy. Check also if the blower has any part damaged.

pls send me snap of your furnace controller , i can help you

Hello, usually this is a sign of a bad blower relay on the intergrated control board. The only option is to replace the control board.

Check by turning the unit off and turn the fan to on. Do you hear the noise now? The noise your hearing could be coming from your combustion fan assembly instead. Newer furnaces have a in-shot burner and are nosier than the old style of heater.

No, the blower motor is supposed to run and dissipate most of the heat. It sounds like the blower motor isn't running.

This can be from a bad connection on a contactor relay. Or can also sometimes indicate a bad capacitor.

Sounds like they wired it direct to line voltage , it should run through a sequencer or fan relay to cycle on and off , your seq./relay could be stuck closed to but unlikely being it was just repaired , call the service company back before you do anything they are responsible.

Remove all power from the furnace, it is likely the brain in the furnace is need of being reset, from the battery replacement, why did you change the battery, was there an indicator telling you to change it?

Many times just removing all the power to the furnace will do the trick with a reset, if not let me know and we will go from there, but it sounds like the main brain is confused or bad, more likely confused, so try the power removed first.

Than let me know [email protected]

Your blower motor may have failed. Check the blower motor for the air circulation and you may find it is hot but not running. Have the motor replaced if this is the case.

If you are running it in the cooling function, your drain maybe backed up. Find your drain outside if you can and suck it with a shop vac.