| I'm not real good with gas ... but... I don't believe you can use a multimeter to check a millivolt gas valve.
When you said you replaced the 'thermocouple', you meant 'powerpile', correct ?
You're sure that the water temp hadn't gone up to High Limit during the initial test ? You tried again after the boiler cooled and still no go ?
Do you know how to use the OHMS scale on your meter ?
If so, there are some readings you can take that will tell us if the aquastat is signalling the valve to open or not ...
I forget ... does the 8148L have an AUTO / MANUAL switch on it?
(and you're sure it's an 8148 L ? ) __________________
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The previous statement is false. |