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Question DetailsAsked on 2/16/2016

Hot water heating system boiler suddenly stopped working. Repairman flipped switch off then on and it restarted.

Boiler suddenly stopped working and pressure and temperature fell to zero. Gas Company Rep checked line and reports that I have adequate gas. System is only 6 years old. Repairman here and restarted and said he had no idea why it went out. Since his visit, it has occured twice more. Each time I turn the switch off, then on and it restarts, but has worked for only 20 hours each time. Is it safe to continue to restart until it can be repaired. What should I ask when company sends NEW serviceman?

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2 Answers


Sounds like almost certainly a safety shutoff cut it off - and the technician destroyed the evidence when he rebooted it - the absolutely WRONG thing to do, and he should be sent to sit in the corner with a dunce cap - or given a bad AL review.

Had he started troubleshooting, first for error codes or error light sequences (some brands flash an LED in different patterns for different issues, some higher end ones have numeric status panel), second for where there was power and where there was not, then for where there was not power across a "kill" sensor (which interrupts the power when the sensor is "active", he could have learned a lot. Then rebooting and checking for power at each sensor, and across "kill" sensors, would have probably identified the reason for the shutdown.

If it is shutting down at the same 20 hour interval each time, sounds like a timer error - so probably a circuit board problem - unless you actually mean about a 24 hour period, in which case a malfunctioning thermostat o bad thermostat programming would be my guess.

Whether you keep doing that reboot thing or not is your call, but I would not - though if in very cold conditions it might be a devil's choice - because something is shutting the system down, and it could well be a safety sensor - meaning you might be continuing running the unit with a safety hazard, and worse if you keep activating and rebooting it the sensor might eventually fail in such a way that it lets the unit keep operating despite the hazard. For instance, I have seen flame rollout sensors and self-resetting breakers melt in such a way that they no longer shut off despite the fact they should have. However, on the other hand - if it runs 20 hours between shutdowns, it does make you wonder if it is a sensor or mechanical problem, because that does make it sound like an electronic issue.

An easy thing to do, though might not make a difference - clean the contacts and put new batteries in the thermostat(s) - especially if you only have one (as opposed to two or more on different zones, which would keep one or more zones going if a thermostat problem. Low batteries or corroded contacts can do odd things to electronic thermostats.

When new serviceman comes, explain what first one did and the 20 (or 24) hour thing, and ask that he debug it to the extent possible BEFORE rebooting it, since this shutdown only occurs once a day.

Answered 3 years ago by LCD



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Answered 3 years ago by Member Services

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