the usual hot/cold

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the usual hot/cold

Post  sqselectrical on Sat Nov 19, 2011 7:10 am

hi, had the usual hot/cold issue on a boilermate 2000, have replaced both dhw and phe sensors, problem is still evident, i can hear the supply to the motor switching on and off on the pcb. Any suggestions gratefully recieved! Thanks

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Re: the usual hot/cold

Post  Midland Boilercare on Sun Nov 20, 2011 9:22 am

HI

When you say the supply motor is switching on and off, which pump are you reffering to, the boiler pump or the hot water pump?
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Re: the usual hot/cold

Post  sqselectrical on Sun Nov 20, 2011 10:01 am

its the hot water pump, you hear the relay de-energising on the pcb, will get the t1,t2 readings and post tomorrow

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Re: the usual hot/cold

Post  sqselectrical on Mon Nov 21, 2011 10:39 am

ok, have the sensor readings so hopefully give a pointer to the fault
store t1 76
phe t2 71 when running dips to 58
dhw t3 H66 when running dips to H41

temp of water at the tap never gets very hot and will fluctuate between not very hot and lukewarm, never getting cold.

would this suggest the heat exchanger?

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Re: the usual hot/cold

Post  MK Group Ltd on Tue Nov 29, 2011 4:55 pm

Hi,

What voltage readings are you getting at the DHW pump when calling for water and when no hot water is running?

Kind regards

Gary

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Re: the usual hot/cold

Post  sqselectrical on Sun Dec 04, 2011 9:31 am

thanks for the replies, i,ve replaced the heat exchangerwhichhas sorted the problem.

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