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Morco D16 pilot goes out


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Hello folks, my morco pilot occasionally goes out when boiler not in use. 

I’ve read a bunch of previous threads on this and believe the thermocouple could be the issue. 

 

Ive taken a look and here’s a few questions.  

* Should the thermocouple be enveloped by the pilot light?  Mine is a close but not immersed in flame. 

* I’ve read you can tweak/bend it to be closer but I don’t see how this is possible as it looks fixed and it’s hard to access. 

 

Any help greatly appreciated 

 

many thanks.   Ed

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2 minutes ago, Polishicebreaker said:

Hello folks, my morco pilot occasionally goes out when boiler not in use. 

I’ve read a bunch of previous threads on this and believe the thermocouple could be the issue. 

 

Ive taken a look and here’s a few questions.  

* Should the thermocouple be enveloped by the pilot light?  Mine is a close but not immersed in flame. 

* I’ve read you can tweak/bend it to be closer but I don’t see how this is possible as it looks fixed and it’s hard to access. 

 

Any help greatly appreciated 

 

many thanks.   Ed

The pilot jet tends to partially block over time. Disconnect the supply pipe from the pilot (you'll have to loosen the far end to be able to swing it out of the way.)  Remove the jet and screw it into the end of a bike pump. Pump vigorously to back-flush the jet. Also blow out the pilot burner. Reassemble and see it the flame is now bigger. If not replace the jet (Midland Swindlers have them). Obviously if you're not confident that you can do this safely, Get a Man In.

 

MP.

 

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That’s great thanks!   On a slightly more pressing note, I took the cover off to take a look and put it back and now it’s not flaring up when I open the hot water tap!!   

Hope I didn’t damage anything, all I touched was the end of the thermocouple!

Edited by Polishicebreaker
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3 minutes ago, MoominPapa said:

If not replace the jet (Midland Swindlers have them).

 

Or... boil it in vinegar then blow it through again. 

 

But yes the pilot flame should substantially envelope the thermocouple tip. If it doesn't, the jet is prolly restricted OR your gas pressure is too low. Usually the former.

 

Don't go bending stuff unless you know how it got bent wrong in the first place. Stuff doesn't bend by itself.

 

(Flame detection electrodes excepted, that is!)

 

UNADJUSTEDNONRAW_thumb_23c3.jpg.eba568aa7c075abf3e0d81fb09bf47d6.jpg

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12 minutes ago, Polishicebreaker said:

Oh no, now the pilot lights but doesn’t ignite gas when I open hot tap. 

What have I done ( he screams head in hands)

Maybe not set the gas control back to the large-flame setting after lighting the pilot, or turned the temperature control to an extreme setting when you removed/replaced the knob?

 

MP.

 

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Phew you’re right.   That’s a big relief!!!

 

thanks

29 minutes ago, Mike the Boilerman said:

Is this a picture of the jet??

 

Or... boil it in vinegar then blow it through again. 

 

But yes the pilot flame should substantially envelope the thermocouple tip. If it doesn't, the jet is prolly restricted OR your gas pressure is too low. Usually the former.

 

Don't go bending stuff unless you know how it got bent wrong in the first place. Stuff doesn't bend by itself.

 

(Flame detection electrodes excepted, that is!)

 

UNADJUSTEDNONRAW_thumb_23c3.jpg.eba568aa7c075abf3e0d81fb09bf47d6.jpg

 

Sorry, I got my posts mixed up. Canal world has changed since I last used it. 

 

Thanks Moominpapa, you were right, I’d turned the setting down! 

 

Ok so I think I’ll try to clean the jet and report back 

 

many thanks 

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