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Our lochinvar knight heating boiler sounds like a fog horn when it operates. We have had the heating contractor over 3 times and spent a total of $500 and no resolution! Suggestions as to cause?

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Does it sound like a train when it starts up ?

Posted on May 01, 2017


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Posted on Jan 02, 2017


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My boiler displays a message lock out no flame ign.

What you are experiencing could probably be a malfunction with the computer part of the boiler. However, last January I had a similar situation. I kept on resetting the system and a message would come on. It warned me that there was no flame and I ended up calling a mechanical contractor to solve the issue. The cause of it ended up being that I hadn't been keeping everything well maintained and the system hadn't been able to properly read everything. It was explained to me that that was a good thing to get fixed as it could have led to potentially more hazardous issues. Have you been keeping your system clean and well maintained before this issue came about? Mechanical Contractors for Albertas Heating Systems

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on Dec 24, 2009 | Heating & Cooling

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We took the pot away from the heat and let it cool. After checking that it was assembled properly, put it back on a much lower heat setting and it is fine now. It appears that the heat on this pot has

Here is a detailed description of how the pressure cooker should work. The "fog horn" should not activate until the second red ring is out of the housing.

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When firing the lochinvar knight boiler it went to "man reset high limit" on computer and says LOCK OUT !?!? is it air locked? the pump in on the supply side instead of the return side. does that make a...

This kind of Manual High Limit issue can most likely be caused by two things :

1) If it's a Knight XL (399MBH and up), it's equiped with a manual high limit with is located in front of the boiler, behind the front panel just under the display bezzel. It has to be adjusted and reset (with the manual reset button on the control display).

2) If your unit is NOT equipped with that kind of Manuel High Limit, this message means that there was a low voltage wire that was shorted to the ground. Either the flow switch or the thermostat wire. The 24v fuse located on the main control board burned to protect the components. Lucky, Lochinvar provide replacements in the small plastic bag attached to the connection board.

Hope this help. Even if i'm late.

Aug 24, 2010 | Heating & Cooling

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Maang, You are a year older than me, so lets see if I can point you in the right direction.(1) If you have access to the internet you should be able to find a manual for an "Ideal Classic Boiler".(I just did) but you'll need to print it out - 40 pages. (2) It is 12 years old and is past it's half life. You might consider a whole replacement boiler - installed by a professional contractor rather than replacing a cracked section of the heat exchanger. Any equipment is only as good as the installation and proper setup when it is new. (3) You should NOT be smelling any gas in the house, period - unless you have a leak. You may be smelling carbon dioxide which is from burning fossil fuels - escaping from the crack in the heat exchanger. (4) What happened to the "Warranty" ?. Before you blow yourself up, Don't try to light the pilot anymore. Call a legitimate contractor.

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My lochinvar boiler is very slow coming up to temperature and turning off,runs almost continuously,it is running infloor heat,thank you

It sounds like your by-pass is shut tight and is forcing more water through heater than the heater will handel. You should open your by-pass 10-20% so the water moves slower through the heater and has more time to heat up.

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