central electric furnace

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central electric furnace

Postby niteowl » Tue May 05, 2009 2:38 pm

I have a model EB17B that suddenly does not work, nothing... no heat or air. serial 950321273.

There is a digital thermostat that is new but as been working fine.

The AC outside does not come on.

The blower fan does not come on when set to "on" via the thermostat.

any help is greatly appreicated.
Thanks for looking.
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RE: central electric furnace

Postby Robert » Tue May 05, 2009 5:47 pm

Hi,

Am moving this over to the Coleman Forum, please follow it there to see my reply.



Thanks,
Robert
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RE: central electric furnace

Postby Robert » Tue May 05, 2009 5:52 pm

Hi,

Remove cover(s) of t-stat to reveal wires, turn t-stat to OFF and test across RC and Y and then across RC and G.


Test both sets for 24VAC.


IF there, reply back.


IF not, go to transformer in a/c control box and test primary-line side for 240VAC.

If there, test secondary-load side for 24VAC.




Thanks,
Robert
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Postby niteowl » Wed May 06, 2009 3:16 pm

Remove cover(s) of t-stat to reveal wires, turn t-stat to OFF and test across RC and Y and then across RC and G.
Test both sets for 24VAC.

I did this, but, RC has no wire going to it.
wires are connected to:
W Y RH G
So i tested RC to Y and G - No current
So i tested RH to Y and G - No current

I do have a readout, and tested the batteries... they are good.

Jumpers are on 3 and 7
3 is RC-RH connected or RC-RH seperate..
7 is Electric Heat

IF not, go to transformer in a/c control box and test primary-line side for 240VAC.

Do you mean the box mounted on the furnace, that has a reen light on and a flashing red light?
Or, he 240 line outside beside the AC unit?


If there, test secondary-load side for 24VAC.
Where is this and how do i test it.

I do have a good meter. And can follow your instructs.
Thanks so much. :)
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RE: central electric furnace

Postby Robert » Wed May 06, 2009 3:49 pm

Hi,

Have you ever ran the a/c in this home ?


IF no wires are connected to RC, then RH and RC have to be jumpered to have a/c.


The a/c control box is inside furnace, but is not the one you mentioned, that is the blend air II control box.


Someone "may" have wired it up with just the needed parts and no box.


With t-stat OFF, test for 24VAC across RH and W.



Thanks,
Robert
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Postby niteowl » Wed May 06, 2009 4:36 pm

Have you ever ran the a/c in this home ?
The owners says it has worked, since, the new t-stat was installed.



IF no wires are connected to RC, then RH and RC have to be jumpered to have a/c.
Jumber Number 3 is jumped RC - RH Connected.

The a/c control box is inside furnace, but is not the one you mentioned, that is the blend air II control box.
Someone "may" have wired it up with just the needed parts and no box.

Not sure about this, i am the neighbor, to this elderly woman.


With t-stat OFF, test for 24VAC across RH and W.
I did try RH and W - No voltage showed on either AC or DC setting.

Thank for your speedy reply.
If possably could you call me, or, I call you?

Thanks James
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Postby niteowl » Wed May 06, 2009 4:50 pm

I am in Georgia, I have to go right now, is there a time you can help me tomarrow?

Thank you so much.
James
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RE: central electric furnace

Postby Robert » Wed May 06, 2009 6:52 pm

Hi James,

Because of my busy and varying schedule, I do not make or receive calls.


I do keep laptop with me and check here and emails fairly regular.


Since it "has" worked, then the problem must be a sudden occurrence.

With t-stat set to OFF and AUTO, you should have 24VAC across RC and Y and also across RC and G.


IF you do not, then trace the red t-stat wire that is connected to RH back to furnace.

Where the t-stat wires enter furnace, find red wire and follow it through any connections with molex plugs, wire nuts, other wires and follow it all the way to the transformer.

Test the transformer primary-line side for 240vac and the secondary-load side for 24vac.




Thanks,
Robert
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