where to find diagrams for lennox heater?

Reply

  #1  
Old 03-02-04, 01:00 PM
logiphage
Visiting Guest
Posts: n/a
where to find diagrams for lennox heater?

I live in New Orleans where we don't need to run the heater very often. I have an central electric heat and AC.

Lennox model number ES2-341-3 serial number B549313.

It got cold enough to bother turning on after sitting many months idle and it didn't come on at all. I called a serviceman and he said there were two bad heat relays and a bad "disconnect" (is that the same thing as a cutout?) as well as a bad belt, but clearly the belt isn't the problem. He gave me a lennox part number 37177 but recommended I buy a new system. Shocker.

MAYBE all this went bad at once.. MAYBE..

Anyway I am not above trying to fix this myself if I could find a digram, even a generic one for how electric central heaters work. But I could not even find that model number or part number anywhere.

If anyone could point me in the right direction I'd be most appreciative!

John
 
Sponsored Links
  #2  
Old 03-02-04, 01:53 PM
Ed Imeduc's Avatar
Member
Join Date: Aug 2002
Location: Mountain Williams Missouri
Posts: 18,389
Did you look on the doors of the unit. There should be a schematic on the blower door there open it up and look. I dont think that has a belt on the blower. If you have a meter you can ring it out. Start with power 220V then check transformer24V. Then to the relays. If you cant get fan at fan on at the tstat look at the transformer first ED
 
  #3  
Old 03-03-04, 11:39 AM
logiphage
Visiting Guest
Posts: n/a
Thanks thats some help at least. I suspected possibly it might be a transformer but wasn't sure where it was. This unit is in the attic and if I recall it does indeed have a belt. I didn't see a diagram but then I wasn't looking for one. I have a little lcd multimeter for electronics but I guess if I am careful should be able to use it. Or maybe should get one of those claw ones...

John
 
  #4  
Old 03-03-04, 11:59 AM
Ed Imeduc's Avatar
Member
Join Date: Aug 2002
Location: Mountain Williams Missouri
Posts: 18,389
Yes a good meter pays off. Dont know if you need the CLAW one but its good to have around That kind also would test for AMP draw on a motor are anything that is running. You want to be able to read the VOLTS 24V 110V 220V. Thats the main thing then the amps.

Now here you said AC . Turn the tstat to fan on . No blower its first do we have power 220V for inside and outside? then do we have 24V at the transformer?Then tstat jump R to G? Then the relay? Then the blower motor?

The transformer should be in the part above the blower or in where the electric heat strips are.

Grainger or Johnstone supply should have any relaysand stuff you need for it. ED
 
  #5  
Old 03-03-04, 12:07 PM
logiphage
Visiting Guest
Posts: n/a
Oh should have said, yes it blows Just no heat. If was blower then would have had no AC either which is not something you can turn into a learning project in N.O... you get it FIXED ASAP

But the heater.. prob won't need it for another year anyway.. so I can mess around with that.

John
 
  #6  
Old 03-03-04, 01:11 PM
Ed Imeduc's Avatar
Member
Join Date: Aug 2002
Location: Mountain Williams Missouri
Posts: 18,389
Ok just heat, you have power we know now. So R to W at tstat is heat. See if heat relays pulls in in the unit. Also with power off Ohm out the strip heaters some of them have a fuse on them inside. Keep the air filters clean every 30 to 90 days. Check the belt and get a new one . The old one can slip some on you ED
 
Reply

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
Display Modes