Search: Posts Made By: Nehmo Sergheyev
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10-18-20, 03:43 PM
Replies: 22
Views: 670
Posted By Nehmo Sergheyev

Here's a question: There are 2 error code...

Here's a question: There are 2 error code conditions that indicate an open limit switch circuit, 4-blinks and 11-blinks. The 11-blink one adds the comment "blower failure". So how does the control...
10-17-20, 02:36 PM
Replies: 22
Views: 670
Posted By Nehmo Sergheyev

If anybody is still following the thread, thank...

If anybody is still following the thread, thank you.
I put the furnace back together sans cooling coils. Now it works for a much longer period, perhaps 15 minutes, but then again it stops. This time...
10-16-20, 11:35 PM
Replies: 22
Views: 670
Posted By Nehmo Sergheyev

I believe I've solved the final problem. The...

I believe I've solved the final problem. The cooling coils were clogged with dirt. I haven't put it together yet; I wanted to post....
10-16-20, 01:59 PM
Replies: 22
Views: 670
Posted By Nehmo Sergheyev

I have now examined the vertical tube to the...

I have now examined the vertical tube to the spider, and there is no blockage.
The circulation motor does not get excessively hot, and it seems to run properly.
The process is flame on for 2...
10-16-20, 12:27 PM
Replies: 22
Views: 670
Posted By Nehmo Sergheyev

The 1-story old house has a basement furnace and...

The 1-story old house has a basement furnace and a vertical shaft that spiders out to several 6" tubes going to the rooms in the "attic". It's not actually the attic but a 2' space between the...
10-16-20, 05:29 AM
Replies: 22
Views: 670
Posted By Nehmo Sergheyev

I got the new board, but before I installed it, I...

I got the new board, but before I installed it, I thought I'd try one more thing. I removed the metal parts surrounding the flames and cleaned them. Actually, I only removed the last (left from my...
09-21-20, 10:46 PM
Replies: 4
Views: 326
Posted By Nehmo Sergheyev

Judging by the detail of your post, I doubt you...

Judging by the detail of your post, I doubt you are going to run into anything you can't handle. I would support the joists by "hanging" them from the rafters with something. You certainly can make...
09-21-20, 02:53 PM
Replies: 22
Views: 670
Posted By Nehmo Sergheyev

I sent away for a new control board. I now find a...

I sent away for a new control board. I now find a video saying the voltage at the flame sensor is "usually 90 volts but varies by manufacture" https://youtu.be/JE3MzApSN7E?t=83 . I'm convinced the 16...
09-19-20, 01:25 PM
Replies: 22
Views: 670
Posted By Nehmo Sergheyev

If you look at the top of page 2 in this pdf for...

If you look at the top of page 2 in this pdf for the control board https://climate.emerson.com/documents/integrated-furnace-control-instructions-en-us-3583550.pdf it seems to say that 1 microamp is...
09-19-20, 01:21 PM
Replies: 22
Views: 670
Posted By Nehmo Sergheyev

I learned the flame sensor is just a piece of...

I learned the flame sensor is just a piece of stainless steel wire, and it works simply by conducting a small current through the flame. This rectifies the current like a vacuum tube rectifier. If...
09-17-20, 04:47 PM
Replies: 22
Views: 670
Posted By Nehmo Sergheyev

Using the second new flame sensor, the furnace...

Using the second new flame sensor, the furnace still did not work. I also tried heating the flame sensor with a propane torch. Still, no improvement. However, measuring the output of the second new...
09-17-20, 01:29 PM
Replies: 22
Views: 670
Posted By Nehmo Sergheyev

According to this video...

According to this video https://youtu.be/Q1NlMP3rtSQ the flame sensor should be producing 3 mico amps when the meter is attached in series between the flame sensor and the control board. With the new...
09-14-20, 12:01 AM
Replies: 22
Views: 670
Posted By Nehmo Sergheyev

I just tested the pressure switch. It's normally...

I just tested the pressure switch. It's normally open, and if I use my lungs as a vacuum source, it will close as indicated by a test meter. I suppose I could do further tests, like to test if the...
09-12-20, 12:42 PM
Replies: 22
Views: 670
Posted By Nehmo Sergheyev

https://photos.app.goo.gl/G4nHyAo82SBufxDE6 ...

https://photos.app.goo.gl/G4nHyAo82SBufxDE6
https://photos.app.goo.gl/e2t2RipR24vyhH2M7
What part of the control board do you want to see?

There's no wiring diagram on the furnace. However, 4...
09-12-20, 12:16 PM
Replies: 22
Views: 670
Posted By Nehmo Sergheyev

Yes, the flame sensor is engulfed in the flame....

Yes, the flame sensor is engulfed in the flame. The flame sensor is in the same position as the one in this video: https://youtu.be/JjjOVoRiMKc?t=55
09-12-20, 11:12 AM
Replies: 22
Views: 670
Posted By Nehmo Sergheyev

The thermostat (my dog keeps begging me to...

The thermostat (my dog keeps begging me to scratch her. She is pushing and rubbing at me while I type, which makes it difficult to type. It's all in good spirits, but she's interfering with my work.)...
09-12-20, 10:38 AM
Replies: 22
Views: 670
Posted By Nehmo Sergheyev

As I said, I am currently getting the normal...

As I said, I am currently getting the normal operation code, a slow flashing amber light.
SLOW AMBER FLASH: Normal operation with call for heat.
Luxaire furnace codes error flash codes....
09-12-20, 01:32 AM
Replies: 22
Views: 670
Posted By Nehmo Sergheyev

Furnace Starts Then Stops After Ignition.

Luxaire Furnace Model PCUHBLD12N100CThe furnace starts properly, ignites, gas valve opens, and it works for 4 seconds. Then the flame turns off. The indicator light is slow blinking amber, showing a...
12-23-16, 12:23 PM
Replies: 7
Views: 2,230
Posted By Nehmo Sergheyev

74756I've already replaced the board, and things...

74756I've already replaced the board, and things seem to be functioning normally.
But what caused this burn-out in the first place? It looks like a serious short, but how could that have happened...
12-18-16, 10:07 AM
Replies: 7
Views: 2,230
Posted By Nehmo Sergheyev

Job done

I successfully replaced the control board in the furnace, and the furnace now functions.
Looking at the old board now that it's out, I realize it would have been a major job to repair. The burn-out...
12-16-16, 05:38 AM
Replies: 7
Views: 2,230
Posted By Nehmo Sergheyev

New 50A56-956...

New 50A56-956 (http://www.emersonclimate.com/Documents/White-Rodgers/instruction_sheets/0037-7475.pdf)
Existing 50A55-843...
12-16-16, 12:28 AM
Replies: 7
Views: 2,230
Posted By Nehmo Sergheyev

One other peculiarity I should point out. On the...

One other peculiarity I should point out. On the pic of the whole compartment, on the bottom of the control board plate, you can see the base of a disconnected capacitor. On the floor, is one hanging...
12-15-16, 11:25 PM
Replies: 7
Views: 2,230
Posted By Nehmo Sergheyev

We already have the replacement control board....

We already have the replacement control board. Actually, someone else ordered it using the numbers I provided.

New Board 50A56-956
existing Board 50A55-843

The first 4 digits are encouraging....
12-13-16, 09:12 AM
Replies: 7
Views: 2,230
Posted By Nehmo Sergheyev

Advice on Replacing Furnace Control Board

We are about to occupy a house that has been unoccupied for an unknown period of time. The furnace is a
Luxaire model # pcuhbld12n100c furnace serial # EKHM791522
MULTI-POSITION NATURAL GAS...
Replies: 4
Views: 1,003
Posted By Nehmo Sergheyev

41150To get the nomenclature down, do you mean...

41150To get the nomenclature down, do you mean the #1 cylinder?
There are 2 routes for coolant to get into a cylinder. The head gasket could be blown or the head could be cracked. 41151....
Showing results 1 to 25 of 41
 


 
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