help with boiler control

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Old 11-05-06, 07:57 AM
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help with boiler control

Boiler is only 6 months old from last home owner. boiler will not fire when it should i have to push swith in Honeywell box to get boiler to fire.boiler temp was 70 this morning with the circulater pumps running.
 
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Old 11-05-06, 08:43 AM
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In the controler you should have terminals marked "TT".
with a peice of wire jump these out (just touch them)
and see if the contacts pull in.
Be carefull, the other side of the controler has line (120v)voltage.
If it does pull in, then you may have lost the control transformer,or you have a t-stat issue.

Pix may be helpfull.
 
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Old 11-05-06, 09:15 AM
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is there any way i can test the transformer and the t-stat. The box is a honeywell L8148E Aquastat. Thank You
 
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Old 11-05-06, 09:33 AM
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The control box is considered a sealed unit.

Shorting the thermostat terminals is an acceptible way to test the burner and its control.
 
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Old 11-05-06, 11:19 AM
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Question

Aquastat. This could be your combo- High/low limit.
It' possable this is gone, and the low limit is not calling.
Did you try the "TT" yet? If yes and it pulled in... Transformer should be fine.
 
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Old 11-05-06, 12:29 PM
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. """boiler will not fire when it should----- i have to push swith in Honeywell box to get boiler to fire"""

".boiler temp was 70 this morning with the circulater pumps running."

This description suggest a combustion problem (presuming an oil-fired furnace). The Primary control will open the power-circuit to the burner motor and "lock-off" if the combustion flame is erratic. The Primary control will remain "locked-off" until it is reset.
 
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