Recalls and Service Alerts

Furnaces - Air Conditioners - Heat Pumps

Single Stage 95 Inducer Noise

Type: Service Alert
Equipment: Furnace
Recall or Alert Date: 09-23-2011
Serial Number: FURN-SVB44B-EN
Brands Affected: American StandardTrane

Description of Problem:

Address a potential noise/vibration concern for the furnace models noted in this bulletin. The action described in this bulletin is not being taken to address a safety concern. Replacing the inducer motor will resolve the vibration noise issues

Furnaces exhibiting a vibration noise: Reports have indicated that some inducer assemblies may emit a vibration noise due to an imbalance of the inducer blower wheel. New inducer assemblies with a Fasco date code of MB1711 (see figure 4) or later are available to eliminate this vibration issue.

Furnaces exhibiting a high pitch — blade pass frequency noise: The inducer blades and housing configuration may generate a high pitch whining noise (a high pass frequency). This noise may be transferred through the vent system. Installing a muffler (see figure 3) in the exhaust vent will absorb this fre-quency.

Affected Products:

Models
ADH1B040A9241A
ADH1B065A9421A
ADH1C085A9481A
ADH1D110A9601A
AUH1B040A9241A
AUH1B060A9361A
AUH1B080A9421A
AUH1C080A9601A
AUH1C100A9481A
AUH1D100A9601A
AUH1D120A9601A
TDH1B040A9241A
TDH1B065A9421A
TDH1C085A9481A
TDH1D110A9601A
TUH1B040A9241A
TUH1B060A9361A
TUH1B080A9421A
TUH1C080A9601A
TUH1C100A9481A
TUH1D100A9601A
TUH1D120A9601A

Source:

Trane