Intertherm heater

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Old 12-13-18, 12:31 PM
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Intertherm heater

Hello, I have a 1998 Intertherm electric furnace. I believe the sequencer is bad and I am trying to figure out the correct sequencer. On the fan it says model E2EB1=015HA. I purchased what I believed to be the correct one Intertherm 621678. The problem is it is upside down from the original. Can anyone help guide me to the correct sequencer...
thanks, Troy
 
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Old 12-13-18, 01:44 PM
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It looks like you may have posted the model number incorrectly. It should be E2EB015HA.

I think you have the right part. Does it look like this ?
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I think this manual covers your unit...... Nordyne service manual

Maybe you can post some pictures of what you have there...... How-to-insert-pictures
It's very important to take pictures in case there is a wiring mixup.
 
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Old 12-13-18, 04:24 PM
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I need to start over on this, I have 1998 Intertherm heater with a blower that has E2EB015HA on the blower. The elements get red hot but the blower doesn't come on. So I ordered a sequencer for a E2EB015HA which was listed Intertherm 621678 - Aftermarket Replacement 15 KW Heat Sequencer Relay. It is the wrong part, it mounts upside down from my old one, the 3 section part is on bottom instead of the top. The numbers on the 3 section sequencer I bought are KSD301C 24V C-031, H1-110 C1-110 , 1604. The numbers on the 2 section part are the same numbers.

My old sequencer has TOD, H24V, 12522, 308850, L9837. and H24V , 12520 308495, L9837.

I just found a sequencer #621678R that has a lot of the same numbers as the old one, and mounts the correct way:
TOD, H24 V, 12522, 308850, A1340, and H24V, 12520, 308495, A 1340.

Can someone please tell me if I am on the right track here. Thanks
 
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Old 12-13-18, 04:52 PM
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Pjmax, yes I believe your picture is what I need, but not what I have.
The first picture I have posted is what I bought that is not correct, mounts upside down and numbers don't match.
 
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Old 12-13-18, 04:57 PM
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This is the sequencer 621678R that has many of the same numbers as the old one has.
 
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Old 12-13-18, 05:00 PM
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This is the old sequencer I need to replace, many of the number match the 621678R..Pjmax is that the number of the picture you posted?
 
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Old 12-13-18, 09:26 PM
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Yes..... that is the part number of my picture.

I left you a link to the manual. If that is the correct one..... it shows a blower relay.
That means you can set the stat to FAN ON to get heat.
 
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Old 12-14-18, 03:59 AM
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Thank you Pjmax for the manual.
I turned up the thermostat, at least part of elements got hot and I turned the fan on with the switch that is located close to the fan. Is that what you meant? It is only putting our warm air, like all the elements are not heating. Do you think the sequencer is my main problem?
 
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Old 12-14-18, 10:44 AM
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It could be a sequencer problem. You need to make sure it's getting its 24vAC control power and then operating or not.
 
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Old 12-17-18, 02:07 AM
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Thank you Pjmax. I do appreciate your help. My new sequencer will be here today. I will test the 24v to the sequencer if I am understanding you correctly.
 
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Old 12-17-18, 06:47 AM
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testing transformer

Ok, I am not sure what to do next. I am trying to test the 24 v transformer.
From the transformer the black and white wire goes to the bottom of the top sequencer. I understand that wire should be 24 v.
The dark blue goes to the fan relay
one red goes the 2 pole limit switch,
the other red goes to the thermostat.
The yellow goes to thermostat.
The black wire goes to the second layer of the top sequencer.

I put the red wire on my meter on the black and white wire, and my black wire on the meter grounded to the heater itself. 1.0 volts with power on when thermostat turned up 1.4v.
I'm not sure if I did this right or not. thanks Dean
 
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Old 12-17-18, 07:05 AM
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Here is the transformer. I pulled the black and white wire off the sequencer for the test, not sure if grounding to metal on heater is the right way.

. thanks Dean
 
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Old 12-17-18, 07:47 AM
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I got frustrated with not knowing exactly how to test the transformer so I put the black and white wire back on the bottom of the sequencer. Turned on power, turned up thermostat and the heater worked like it should. So I am now thinking my transformer is ok and maybe the sequencer was stuck?
Or I might have moved the wires around enough to have caused a wire to make contact that was maybe corroded. It is cycling as it should.
 

Last edited by Troydean3326; 12-17-18 at 10:19 AM.
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Old 12-17-18, 10:36 AM
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Hard to see all the transformer leads but there are four connections.
Two are the high voltage 120/240vAC and the other two are the low voltage 24vAC.
 
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