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Re: Trianco-Heatmaker not starting heating cycle

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Posted by Terry on December 10, 2006 at 15:53:14:

In Reply to: Re: Trianco-Heatmaker not starting heating cycle posted by pablo rossetti on October 08, 2006 at 20:17:09:

: : Hello,
I have a problem with my heatmaker II as well. The problem I have is that it doesn't call to heat the hot domestic water when it should. When the temp in the tank falls to 140 degrees the boiler should fire up and start heating the water but it doesn't. The temp will fall to 100 degrees and still the boiler doesn't fire up, only once in a while, so what I do is take the front cover off the unit and then take the cover off the pressure diferential switch and take a screw driver and touch the contact screw above the switch and then the boiler starts up. The computer board looks fine with little green light so is there any way to fix this problem?
Could some one please help me with this dilemma?
Let me know if you need me to be clearer on the subject. Thank you and best regards, TerryD.

: : I have a HW series Trianco domestic hot water/condensing boiler...

: : The heat will not come up unless there is a call for domestic hot water. This happened once before and once the "low limit" sensor was replaced it worked. Now, it is doing it again even after replacement of this sensor. Today will be the third time the service personnel are called back and I am wondering if this is a common problem and what the solution may be?

: : The status lights on the control panel all look OK... when the uinit *does* turn on, it goes through the normal sequence and the boiler fires off.

: : However, if the unit gets *cold* and you turn up the thermostat; (say in the morning when you get up and the hot water hasn't been on) the boiler will not run. If you turn on the hot water, just long enough to get it *hot* and then shut it off, the boiler will run through a normal heating cycle.

: : Any suggestions?

: :

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