QuadraFire Mt Vernon Conv Fan Jammed Code

[ProjectDevils]

I started having some problems with my Mt Vernon AE late this winter. I got a couple Combustion Fan jammed codes that cleared when I unplugged and then plugged back in.

Now I got some Conv. Fan Jammed codes that wont clear. I opened up the side of the stove and reached around to the fan and it freely turns. When I first got the Comb. Fan Jammed code, I dismantled it and cleaned it thoroughly. Now the stove will cycle, clean and start a fire but then the Conv fan never comes on so it all dies out.

Nearest real good tech is a long ways away.

Any guidance would be greatly appreciated.

 

[SwineFlue]

The AE has a second thermocouple, mounted near the bottom of the drop tube according to the manual. Check to see if maybe you knocked it loose.

If you have a volt meter, check to see if the blower is getting a voltage (it should be 12 V DC on that stove, I believe).

 

[Mt Bob]

Jumper tc2 then start stove and try. (broken link removed to http://www.mortonsstoves.com/wp-content/uploads/Quadra-Fire-Mt-Vernon-Troubleshooting-Manual.pdf)

 

[stovelark]

Yep, drop tube t/c prob culprit, check conv blower too of course..

 

[ProjectDevils]

Wouldn't I get the Drop Tube TC error message?

 

[hooter04]

Drop tube thermocouple turns convection blower on and off,varies the speed of the convection blower.

 

[stovelark]

Project- Yes I would think you should get TC2 error msg. If power is at the convex blower and nothing is wrong with the blower, then tc2 would be my suspect.

 

[ProjectDevils]

I checked power at the Conv Blower. Got 5.0V. Is that the correct voltage?

I unplugged TC2 to try and test but my leads are too big. This did create a TC error on the screen though.

So am I to suspect a blower motor?

 

[ProjectDevils]

I did recheck the TC2 and I believe I got 20 mV. or thereabouts. My voltmeter's lowest setting is 200 mV and I got .1 when I tested the TC.

 

[stovelark]

Not sure what the voltage is supposed to be (I was thinking 15.0 VDC, but not sure). Will check when I go to work tomorrow and get back to you if no one else has. Sounds like TC2 is working normally.

 

[ProjectDevils]

This was as fire was starting. So, perhaps the voltage would increase as temp in fire pot increases???

Is Conv fan a variable speed fan?

Thanks everyone. The one go-to tech is nearly 80 miles away and won't be out my way for some time.

 

[Mt Bob]

I gave you a link to step by step diagnosis. (broken link removed to http://www.mortonsstoves.com/wp-content/uploads/Quadra-Fire-Mt-Vernon-Troubleshooting-Manual.pdf)

 

[hooter04]

Yes convection fan is variable speed.

 

[ProjectDevils]

I saw the step-by-step but maybe I overlooked what the specs for voltage are.

I do have voltage at the conv blower plug. But only 5V. Is that norm at startup?

 

[ProjectDevils]

Got a new convection fan ($250) and after some effort, got it in and the stove works great.

Thanks for the advice and help.