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Electric Furnace Blowing Cold - Fuse Link Needs Replacement?
nov4cane
Member Posts: 2
Hey everyone,
After a lot of research and testing I think I've found why my electric furnace is blowing cold air, but I wanted to verify with the community.
My electric furnace stopped blowing hot air recently and I found that the cause of the issue was likely due to a really dirty (should have been replaced) air filter. I replaced the filter, left it off for over an hour, tried power cycling, and it still blew cold air.
Checked the continuity on the thermodisc limit-switch (it was good) and on the coils themselves (good as well). Then I noticed what I believe is the Fuse Link seemed to have a part fallen off. I believe this is due to it overheating from trying to pull through a dirty filter. (or maybe it just fell off? I'm not 100% sure how these work)
Here's an album with images of what I described: https://imgur.com/a/yL8Ul3x
Am I correct that if I replace this fuse link, it should fix the issue?
UPDATE: Fuse Link (SL075B) definitely was the issue, and the disgusting filter blocking airflow is certainly what caused it to blow. After replacing both, the heater has been up and running perfectly.
After a lot of research and testing I think I've found why my electric furnace is blowing cold air, but I wanted to verify with the community.
My electric furnace stopped blowing hot air recently and I found that the cause of the issue was likely due to a really dirty (should have been replaced) air filter. I replaced the filter, left it off for over an hour, tried power cycling, and it still blew cold air.
Checked the continuity on the thermodisc limit-switch (it was good) and on the coils themselves (good as well). Then I noticed what I believe is the Fuse Link seemed to have a part fallen off. I believe this is due to it overheating from trying to pull through a dirty filter. (or maybe it just fell off? I'm not 100% sure how these work)
Here's an album with images of what I described: https://imgur.com/a/yL8Ul3x
Am I correct that if I replace this fuse link, it should fix the issue?
UPDATE: Fuse Link (SL075B) definitely was the issue, and the disgusting filter blocking airflow is certainly what caused it to blow. After replacing both, the heater has been up and running perfectly.
0
Comments
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Fuse links are the "last line" of defense. Not enough airflow on an electic heating element is bad. If your meter is telling you that the electric elements are still ok then count your blessings and replace the fuse link with the proper one. Keep the air filter clean and the blower and blower motor up to snuff. Don't rely on the safety controls to save your unit. If you do it will fail before it's time. Also shut the power down and inspect the heating elements even if you have to pull them out. If the filter was dirty the elements could be covered with dirt/dust-1
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Alright, I'll replace the fuse link and report back if it was indeed the solution. Appreciate the speedy replies from everyone0
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