Jump to content
Sign in to follow this  
jamesvinton

Atwood Furnace In My New HR Ambassador

Recommended Posts

Sounds like sail switch may not be closing. That would be the first thing to check. The air movement from the fan blows the sail switch paddle and closes a circuit which then allows the opening of the gas valve and ignition. Often mud wasps or other debris prevent the sail switch from operating properly. Clean the exhaust tube and air intake tube by removing outside cover. Check for movement of sail. Can be prevented by use of screen cover.

Share this post


Link to post
Share on other sites

Yes, a non-closing sail switch will allow the fan to come on, but not for the gas valve to open or igniter to work.

But, there are number of reasons for a sail switch to not close in addition to a bad sail switch:

Low voltage is #1-- fan spins too slowly to generate sufficient CFM.

Blockage in either the return or outflow side (say, for example, you closed a couple of vents).

Bad connection at the PC board-- often "cured" by removing the connection and using a good electric cleaner. De-oxit makes some excellent products for this.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
Sign in to follow this  

×
×
  • Create New...