I have the dreaded sporadic ignition lockout. I have seen what
happens. The first three burners on the right all light off. The
fourth one has only a 50/50 chance of lighting. Of course, that is
where the flame sensor is. Had a service man in today - and naturally
it did not do it for him.
I have pulled out the manifold and checked the orifice for #4 burner -
it looks fine, not blocked.
In fact, once it manages to light it burns just fine.
(This is a Carrier Weathermaker Infinity high-efficiency job - fuel is
The manual says that bad flame carryover or propagation of flame
between the burners could be the problem.
But they don't say what to do about it.
Thanks any info.
Gee, when he comes back, and replaces the new "fuel valve", and still
doesnt see the problem, Im sure he will tell you it has been "cured"
and you will then pay his bill.
Then, just like before, it will do it again.
Now whatcha goina do?
Nothing like a parts changer.
Ummm - refer to my original posting
the oriface for burner #4 is clean as a whisle
and, BTW, I replaced the burner tips on all 4 burners with new ones
only last season
===>> NOTE TO FORUM FACILITATOR
this group seems to provide more insults than help. Was it always this
So what your saying is that you had this problem last year too and you
or some brilliant one decided to replace burner orifices.
Now another brilliant one wants to replace the "fuel valve".
You must have "lots-o-money".
Before I leave, just let me say that I replaced the burner nozzels.
These are little aluminum tubes with ceramic inserts in the ends -
these things are easily changeable and not very expensive.
I did not touch the orifices - just verified that they are were clear.
It did not noticeably help the problem - but summer came, so I did not
now its winter - the problem still persists, so I called the service
guy. He cranked up the pressure a bit and it seems to have helped
make the lighting more reliable. But the flames are yellow and
probably making soot...
I would rather pay the service guy than listen to certain foul-mouth
trouble makers on here. Its too bad really.
But I am checking out and you will have to guess what the solution to
this problem was.
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