Results 1 to 3 of 3
  1. #1
    Join Date
    Nov 2011
    Posts
    32

    Carrier 58 MVC Variable Speed Furnace--Blower Chamber Questions

    Hi, I have a 58 MVC in the crawl space which has a filter box between the furnace and the return ducts. I pulled out the filter to check it and happened to notice that I could see into the blower chamber in the furnace. I saw a couple of things of concern.

    First, there was a circular hole about an inch wide in the bottom of the blower chamber where wires were coming in (presumably to the blower fan). There is no seal around the hole or wires, so I imagine air from the crawl space is being pulled in to the blower chamber (post filter) and distributed through the home.

    Second, upon close inspection, the door to the furnace was not on completely right and there was a few small spaces which would allow crawlspace air to be sucked in as well. In the dark, I was able to stick a flashlight through the filter box opening and shine light through the blower chamber---I could see the light coming through small spaces between the furnace door and the furnace where it did not seal, so certainly air could pass through as well.

    I'm no expert, but I thought a blower chamber in a furnace would be sealed very tightly. Also, I'm surprised the furnace door is "the seal" between the blower chamber and the outside. In my upstairs furnace (different model), you can take off the furnace door but still do not have access to the blower chamber.

    Does this seem right? Any thoughts on what should be done? Thanks very much in advance.

  2. #2
    Join Date
    Oct 2010
    Location
    Anderson, South Carolina, United States
    Posts
    6,441
    Manufacturers are getting a little better about sealing their cabinets and doors but IMO don't do a very good job. Sounds like a job for duct tape

  3. #3
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    33,916
    Most furnaces, when you take of the "blower" door, there is the blower. A few downflow models have a plate over the blower that has to come off too. That is a royal pain!!!!!!!!!!!!!!!!!!!

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Comfortech Show Promo Image

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine
Comfortech365 Virtual Event