enviro fire EF 2 fan controller switch still has no control

[Evi Morrison]

hopefully some one on here can help me out because i am lost. i did exactly what every manuel has said to test the switch and and they all point to the fan controller switch being bad. replaced the switch and still no control. would like some help on this problem I'm right now lost on what else could be the problem. any insight to this would be great thanks.

 

[chamas]

Which fan?

 

[Evi Morrison]

Oops. It's the convection blower. The one the fan controller is supposed to control

 

[Don2222]

Hello

I repaired an EF-3 blower fan knob a couple of weeks ago . I believe it is similar to the EF-2. In this case the potentiometer was correctly changing resistance to bias the Triac to reduce the fan voltage to lower the room fan speed. However the Triac was bad and the fan would only run on high. Therefore I replace the module with a new Fan speed knob and resolved the problem. I also put the stove on a surge protector. Any power surges after a storm can ruin the Triacs on most pellet stove control boards.
Here is the part
(broken link removed to http://www.stove-parts-unlimited.com/Enviro_Fan_Controller_with_Knob_115V_p/ef-045.htm)

 

[Evi Morrison]

The link you sent me sends me to a fan controller. I don't think that's the part you wanted me to go to. I already replaced that. Not sure what the triac is. It looks like the wires go to a blue box in the back of the stove then to the blower. Is the blue box what your talking about ?

 

[Don2222]

The link you sent me sends me to a fan controller. I don't think that's the part you wanted me to go to. I already replaced that. Not sure what the triac is. It looks like the wires go to a blue box in the back of the stove then to the blower. Is the blue box what your talking about ?

The Triac I am referring to is in that Fan Controller box.
I posted a picture of the triac. It is in the 3rd pic here of my thread.
https://www.hearth.com/talk/threads/enviro-ef-3-room-blower-only-runs-on-high.103408/#post-1337256

The blue box you are referring to is the Auger Timing module that only controls the auger timing for the different heat settings.

If you look at the wiring diagram on page 31 of the owner's manual you can see.
http://www.enviro.com/images/manuals-brochures/owners-manuals/C-11219 Instruction EF2 Domestic Owner's Manual.pdf

 

[Evi Morrison]

I replaced the fan controller

 

[Don2222]

I replaced the fan controller

Then it is possible the room blower is bad.

 

[Evi Morrison]

The fan it's self? I wired direct to 115 then put a dimmer switch in it and it worked fine