Jump to content
Click here to check out our structured, online appliance repair training courses for rookies and experienced techs.

FAQs | Repair Videos | Academy | Newsletter | Podcast | Contact

Stay connected with us...

Subscribe to our YouTube channel for lots of appliance repair tips and help! Subscribe to our MST Radio podcast to learn secrets of the trade. Sign up for our free newsletter and keep up with all things Appliantology.


This topic is now archived and is closed to further replies.


Honeywell Electronic Air Filter

Recommended Posts


OK, will try this newish forum.

Have Honeywell(F50E1141) electronic air filter with carrier furnace.  Has 2 cells that come out for cleaning and I have kept them clean.

My question:  some times after cleaning the cells, the system does not "test" as working.  There is a test button on the bottom of the access door that shorts the cell and is supposed to make a popping sound.

In the access panel there is a very detailed flow diagram on how to trouble shoot and I have followed it very carefully.  Neon light is on etc all is in order but no popping sound.  It ususally does pop after cleaning. 

I tested the cells with a volt ohm meter and there is no short between the frame and the collector or ionizer parts.

When the cells are inserted but the power is off, I get a loss of resistance between the frame and the test port; I think this means the connections with the cell and the voltage source are connected.

I think all is well but I am not sure I am getting any ionization if there is no "popping" sound when I press the test button.

Is it possible the light is on but no high voltage is being applied to the ionization wires and collecting plates? 

The neon light stays on when the access door is removed; I don't recall this happening before.

Any ideas would be most welcome!

Many thanks in advance.


Share this post

Link to post
Share on other sites

Need appliance parts? Call 877-803-7957 now!


although the cells appear dry once they have been washed,there is still enough water trapped in them to create a "shorted cell" scenario,i usually recommend that folks turn the power switch off and run the fan for a day with it off to completely dry the cells,then turn it back on- the best way to test is to strike the return duct with your hand when the fan is running and the unit is energized as you'll dislodge some dirt and you'll hear the cells snap as the dirt passes through-remember,when they don't snap,it is a good thing as it is a sign they are clean and efficient.

Share this post

Link to post
Share on other sites

Wow, thanks for the quick reply.

I think the cells are quite dry; it has been weeks since I washed them.  I tested the cells too with the volt ohm meter and got no shorting detected.

Is it possible the neon light would be on but no power to the cells?

I am also wondering about the light being on when the access door is off; don' t remember that being possible before.


Share this post

Link to post
Share on other sites


Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.