Great video, clear explanation. I have central heating working fine but no hot water. I have been informed that DHW Thermistor could be an issue as boiler does not know of problem. Thanks I will try your video explaination. Jay
Hi really really like your video well explained really appreciated to you for share your knowledge with us Kindly please can you upload more videos like how to check boiler fan & air pressure switch & more like boiler fault finding & Diogenes Thanks a lot
Just a quick question please , my heating hasn't been on all summer (turned to dhw only ) , however water has been hot as normal , pressure is fine , however water often goes cold , from these videos it sounds like the temp sensor , however pilot light goes out , would pilot light go out if bad hot water sensor and dhw on only ? Thanks
great vid , replaced 3 of these in one year .. how come they keeping going wrong? never had to change one in 10 years and now three in less than a year ??
I believe when you tested the second thermistor the lead tips were touching and that's why you got the O.L reading....then when you moved you got a correct reading. You remind me of tradies I've hired here and cost me more $$$ then needed.
redrock1963 im just comparing these readings he got the first one was correct for room temperature, and the second one of 9000 is showing a temperature of around 27 Celsius.. I wouldn’t say that’s too problematic if anything the boiler might cycle on and off at lower deltaT room temps..
If the lead tips were touching you wouldn't get a O.L reading (basic electronics testing). You would get 0.1- 0.9 ohms like he showed earlier in the video.
I may be missing something here but the 10k and second one at 9k are almost the same resistance so both registering around room temp. 80 degrees C would be about 4k - I am not a heating engineer so what am I missing here??
Hello sir l have sensor boiler temperature, 3 wire cable color : Red,blue and white but l dont now type of sensor RTD or Thermocoule . Please help me sir Thank you…
These work by decreasing the resistance proportionally with an increase in temperature, for example 25 degress C to start at 12,000 Ohms, to 55 degrees C at 4,000 Ohms. As temperature goes up, resistance comes down.
Kombi sensör arızasını anlaya bilmek için açıklayacı video. Ustaya teşekkür etmek lazım.
Thanks a lot , the explanation is perfect,
Great video, clear explanation. I have central heating working fine but no hot water. I have been informed that DHW Thermistor could be an issue as boiler does not know of problem. Thanks I will try your video explaination.
Jay
Hi really really like your video well explained really appreciated to you for share your knowledge with us
Kindly please can you upload more videos like how to check boiler fan & air pressure switch & more like boiler fault finding & Diogenes
Thanks a lot
A thermister can go open circuit when resistance increases/decreases so dont take it for gospel they are ok... (Had a few thats done it)
Yes, .more component testing vids please. Pumps, valves, boiler internals.
Many thanks.
Is it possible to test these sensors while they are installed on the combi boiler? TIA
Just a quick question please , my heating hasn't been on all summer (turned to dhw only ) , however water has been hot as normal , pressure is fine , however water often goes cold , from these videos it sounds like the temp sensor , however pilot light goes out , would pilot light go out if bad hot water sensor and dhw on only ? Thanks
EXCELLENT VIDEO , as i was looking for a new meter after getting some funny readings off my tpi ez100 ..
great vid , replaced 3 of these in one year .. how come they keeping going wrong? never had to change one in 10 years and now three in less than a year ??
Good job and thanks for giving this information.
Excellent video well explained about thermistors
Please upload more video about boilers such as diverter valve/diaphragm etc.
Thanks
I believe when you tested the second thermistor the lead tips were touching and that's why you got the O.L reading....then when you moved you got a correct reading. You remind me of tradies I've hired here and cost me more $$$ then needed.
redrock1963 im just comparing these readings he got the first one was correct for room temperature, and the second one of 9000 is showing a temperature of around 27 Celsius.. I wouldn’t say that’s too problematic if anything the boiler might cycle on and off at lower deltaT room temps..
If the lead tips were touching you wouldn't get a O.L reading (basic electronics testing). You would get 0.1- 0.9 ohms like he showed earlier in the video.
Great video mate, please do more on components testing it's always good viewing.
I may be missing something here but the 10k and second one at 9k are almost the same resistance so both registering around room temp. 80 degrees C would be about 4k - I am not a heating engineer so what am I missing here??
Does it matter which wires go on which terminal mine are independent, not in a block thanks
Is the for all thermistors or do different ones have different ohms ratings.
If I unscrew this from my boiler will water come out. Or is it sealed in a pocket
Would this explain why the hot tap runs hot then cool ?
I'll try to do a clip on air pressure switches in the next few days.
Please make live and dead test of each component of boiler
KaneInternational do a great set of clips on Flue Gas Analyses on youtube. But when i get a chance to do a vid on site i'll do one.
Hi, when removing these sensors.. Do you need to drain the boiler or anything like that? Will water be behind the sensor?
MonkeyPumpkin some are dry pocket but I'd drain it to be sure.
TippTopp81 thank you very much for the reply!! :)
Ok so we don't have a fluug so what do we do guess what ohms it is to be set?
Hello sir l have sensor boiler temperature, 3 wire cable color : Red,blue and white but l dont now type of sensor RTD or Thermocoule .
Please help me sir
Thank you…
Very well explained tho
Where do you put the probes on a single pin sensor?
taab7 one side on the pin the other side to earth
well explained thanks.
Hi,my boiler keeps shutting down when i run a bath,could it be a faulty thermister?
Blocked plate heat exchanger 👍
11.000 to 13.000 oms is when the boilers cold what should it read when boilers running???
These work by decreasing the resistance proportionally with an increase in temperature, for example 25 degress C to start at 12,000 Ohms, to 55 degrees C at 4,000 Ohms. As temperature goes up, resistance comes down.
tipptopp, you sound like a Wiganer, are you? good vid BTW
Only if the thermistor is an NTC.
Yes. No mention of NTC vs PTC thermistors. Otherwise good info. Cheers!
any chance of a tutorial on flue gas analysers please
I'll try to do a clip on air pressure switches in the next few days.
TippTopp81 Nice video. We're still waiting for the new video ;)