L&L BLOG

Fixing a Fan Motor on the Vent-Sure

/pottery-kiln-parts/vents#search-resultsOh My Gosh you guys…I am not able to fire and orders are stacking up!!!  HELP!!!! my fan that was fairly new has just  quit working….. Please help me and tell me what to do I would like to fix it if at all possible. but do need to do it fast… or if that fails I will have to buy another fan …which is troublesome since this one has not been fired a lot! I have an easy fire kiln Model number: e28s-3-240 serial Number 042512-c-checer Voltage: 240 Phase :1 Amps:47.9 Watts : 11500 Max temp 2350 Thank you for your quick response!!!!

Gayle B

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Hello Gayle, We are here to help to make sure you get those orders out. Now, have you identified the problem to be just with the fan or is the kiln experiencing problems as well? First check for leaks in the aluminum duct. You might have to replace it if necessary. Also, check for corrosion (caused by clays with high amounts of sulfur, phosphorous, or fluorine) and check for wax or carbon buildup if you are using a wax resist process or a high carbon content clay. Please clean it out if this is the case. If the discharge duct to the vent is facing up you may get water into it which would rust the motor. If this is the case try taking it apart and spraying with WB-40. If all else fails I think it is most probable to replace the vent all together. Please let me know if this helps with the fan, if you have further questions, and if the kiln is having particular problems too.

Service Team, L&L KIln Mfg., Inc.

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Thank you for your quick response I will check on what you said How Much is a new fan for that model? Thank you so much

Gayle B

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It all depends on what needs to be replaced or fixed. If it is just a problem with the motor not working then you just need a new motor which is $230 dollars. The flexible duct could be the problem and that is $33. It could also be that the motor and the inlet/outlet ducts are corroded and an assembled motor is $370. The entire system is $480, but I do not think you will need to replace the whole system. Here is the link to all the vent fan parts.

Service Team, L&L KIln Mfg., Inc.

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With your help my husband fixed it! Gayle B.

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Glad to hear it, Gayle. Was it just a buildup? Service Team, L&L KIln Mfg., Inc.

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That is exactly what happened...thanks for your help! Gayle B.


Do new thermocouples need to "broken in"?

I expect to receive delivery tomorrow evening of 3 new thermocouples for my JD-2927-HD kiln (originally purchased in 2007). Should I plan a "run-in" firing, say to Cone 5, when these new thermocouples are installed? (Note: I installed new elements last October and performed a "run-in" firing for the new elements.) Thank you. -- Thomas ************** Thomas -

No need to "break in" your new thermocouples. On the other hand, elements need to be "broken in" to eliminate the stretch springiness and oxidize them for protection. None of this applied to thermocouples.

One thing to watch out for, however, is that your old thermocouples may have drifted in accuracy over time. If you changed your thermocouple offset you may want to reset it to the original value - which would have have been +18 Deg F if you have our ceramic protection tubes.

L&L Kiln Mfg., Inc.


Unbalanced 3 Phase kilns and why the amperage can be odd

A distributor asks:

On 208V 3P, why does the e23S-3 pull 34.6 amps, but the e23T-3 only pulls 27.7 amps? Is that a typo, or does it have something to do with splitting 3 phase over 4 elements?

Answer: On an e23T-3 you have three balanced circuits. There is a total of 48 amps being split three ways. A simple way to calculate this is that each phase is taking 16 amps X the 3-phase factor of 1.732 to get 27.7 amps on each phase. On the e23S-3 the full amperage of 40 amps is split between two phases with one phase unused. So 20 X 1.732 = 34.64 per phase. You take the highest amperage on any phase to get the amperage of the device.