Thank you for your question on the model 741WHNT. We will need to know the revision letter that follows your model number in order to supply you with the correct parts. You can find this up, inside the housing on a specification label. There will be a letter A or B that follows the model number. Please contact us directly for more assistance at 1-800-558-1711.
Answered by: NuToneCustomerService
Date published: 2013-12-03