True North TN20 fan 80000905 surging/pulsing

[Jjames12]

The blower on my TN20 surges/pulses at all speeds other than high. I inspected the wiring and didn't see anything abnormal. Any help is appreciated.

 

[begreen]

Sounds like the speed control is failing.

 

[Jjames12]

Sounds like the speed control is failing.

Thanks. I appreciate your time. I'll get one ordered and see if that does the trick. Wow.... Initial search has it priced at $65.00.

 

[begreen]

Ouch. That's expensive. I'm wondering if this would do the trick.

DIAL-A-TEMP Variable Speed Control

Variable Speed Control Fireplace Blower - Rheostat - DIAL-A-TEMP

www.myfireplaceblower.com

 

[stoveliker]

or this?
Amazon product ASIN B0714FFG4F
I am using this. Different role (for inline duct fan), but technologically similar.

 

[d.sebens]

Here’s what my insert uses.
(broken link removed to https://www.ebay.com/itm/KB-ELECTRONICS-KBNH-13BV-AC-MOTOR-FAN-CONTROL-120V-2-5A-PSC-SHADED-UNIVERSAL-/383664237399?mkcid=16&mkevt=1&_trksid=p2349624.m46890.l49286&mkrid=711-127632-2357-0)

 

[Jjames12]

Sounds like the speed control is failing.

Thank you sir! That was the problem. It's working great now.

Thanks for the other recommendations. I found one for $20 that fit inside the faceplate.

 

[begreen]

Thank you sir! That was the problem. It's working great now.

Thanks for the other recommendations. I found one for $20 that fit inside the faceplate.

View attachment 293119

Well done!