Boiler temperature and pressure

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Old 02-13-18, 06:09 PM
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Boiler temperature and pressure

Tonight, I happened to look at the boiler and saw this reading (see photo). Functionally, it sounds fine and seems to function fine. But this reading doesn't seem right.

We had a new electrical panel installed today. So at first, I thought it might be due to the fact that the electric was off for a period of time today. But it is still like this a few hours later.
 
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Old 02-13-18, 06:32 PM
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At 135f it would appear the boiler hasn't run in a while. At idle..... the pressure should be around 14psi and then rise to around 20psi or so when hot. You may just be low on water. Allow the boiler to come up to heat and then check the pressure gauge again.

In the mean time..... check around for a closed off water fill valve.

It could be a stuck gauge too.
 
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Old 02-14-18, 04:44 AM
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Thanks!

What temperature is a good temperature to be fully up to heat?

This morning I looked at it and it is at 175 degrees. The PSI is the same.
 
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Old 02-14-18, 05:11 AM
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Turn the boiler off for a time and allow the system to cool. Then go to the highest radiation in the house and if it has a vent valve open it to see if you get water out that vent. If you do and the gauge still reads near zero then the gauge reading pressure is bad but you do have enough pressure in the system. Wait till spring and replace the gauge with one that has a lower scale and is made for a residential boiler.
 
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Old 02-14-18, 09:08 AM
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175f is a normal boiler.... at full heat temperature.
You could give the meter a few taps to see if it's stuck and may break loose.
 
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