Heaters.....

[jimmyringo]

Got me foxed then. Can't understand why 2 different heaters would have this same problem.


AC

Ditto

Me too.I've never understood it,but never worried about it that much.

To answer an earlier question,both heaters used were 200w and yes they do come on intermittently.

And theres no radiator nearby.

A strange one indeed.

 

[keenonfish]

Is it possible you have twisted the tops beyond their lowest or highest setting I know unlikely to be the answer but if both are exhibiting the same fault...?

What make are they maybe an email to the manufacturer.. faulty batch and all that.

The only other possibility is that you have accidentally swapped the faulty heater back in the tank which is something I would probably do after a drink or two

 

[jimmyringo]

Is it possible you have twisted the tops beyond their lowest or highest setting I know unlikely to be the answer but if both are exhibiting the same fault...?

What make are they maybe an email to the manufacturer.. faulty batch and all that.

The only other possibility is that you have accidentally swapped the faulty heater back in the tank which is something I would probably do after a drink or two

None of the above.one for The X-Files i think

 

[raptorrex]

None of the above.one for The X-Files i think

lol The Heat is out there!!!!!!!!!!!! err somewhere.

 

[OldMan47]

The only heat source that I have not seen discussed is the filter pump. That pump adds heat in 2 ways. One is the simple mechanical energy given the water to make it move. That heat will not usually be significant in the low flow of an aquarium. The second place that it will add heat is the waste heat of the pump itself. As anyone who has an external filter knows, the pump casing where the motor is located can get quite warm. In the case of an internal heater that heat will be removed by the water getting a bit warmer than it would be. It does not explain why it would stay warm regardless of thermostat setting but get cooler when the heater is unplugged, but it would be a significant heat source if you have an internal filter. In my case I am always trying to heat up my tank water so I don't mind that bit of waste heat being converted to heating my tank. If I was having a problem with higher temperatures, I would switch away from any internal filter to remove the heat source.

 

[onebto]

Hello guys been sort of reading in on this one interesting subject.

Apologies if I missed it or if it has nothing to do with the problem but all the heater controls will have a differentials i.e if you have set your heater to say 26 degrees then you will either have an over temp diff (rarer and most unlikely in a bit of kit like an aquarium heater) more likely the under temp diff so say the diff is 1.5 degrees then simple maths tells us the temp would fluctuate between 26 and 24.5 degrees but being honest I cant see these heaters having such tight diffs as 1.5 degrees I may be wrong but in my experience the tighter the diff the better the kit and the price of the better kit always increases !

NOW the good bit and a possible answer

In my experience of mechanical operated thermostat contacts over time the diff can degradate i.e increase so your 26 degree setting with a diff of 1.5 degree could degradate to say 3 or 4 degrees or more I have witnessed this in Refrigeration thermostats many times and a ***** of a fault that always used to catch out the junior engineers


What do you think do i get the cigar ?

Merry Christmas to one and all by the way

 

[OldMan47]

A merry Christmas to you BTO.
The thing that is still confusing me is that regardless of heater setting, the tank always ends up at 26C but if the heater is not plugged in, the tank drops to 22C. My own interjection was just to prompt thinking of other heat sources than the heater but it also can't explain the observed system response.

 

[jimmyringo]

I have an external filter.Theres no obvious heat source near the tank,although i don't know whats on the other side of the wall as that's the neighbours house.But still,as the temp drops when the heaters off,it still wouldn't explain anything.