Other users of howtomendit.com provide the answers. The more detail and information you provide in your question the easier it is for others to help you.
About us
howtomendit.com is a free website which can help you find information help and advice to help you fix or repair just about anything.
You ask your question.
Others will try to help you.
See how simple it is. Click here to ask a question.
Hot Water but no CH Potterton Netaheat Profile 30e-80e?
In the last day or so we have noticed that we are getting hot water but no Central Heating (rads are cold etc.). After a brief examination we've noticed that the Boiler is being 'called to heat' and then before rads get warm the bolier shuts down/goes to standby. The Pilot Light is working Okay. The Fan was replaced approx. 3 years ago, a new Drayton 'Room Stat' fitted approx 2 yrs ago and most recently (3 weeks or so ago) a new Drayton Timer Programmer was fitted (faulty Advance switch on original ACL model) and the system was working well through October. The system is 18 years old so I guess it's to be expected that things will wear out from time to time. I have read through the various Q's here at How to Mend it.Com and their associated threads and none quite match up to this current fault (i.e. comments re 'faulty Mercury Vapour Valve', 'faulty R14 Resistor', 'faulty Overheat stat', 'Empty Header Tank', 'Pump' etc.). The 3 way valve was checked, with pump 3 weeks ago when diagnosing Prog/Timer issue and all seemed okay. The Room Stat is clicking with call to heat and so is the Bolier Thermostat (Thermostat Control Knob on Boiler) seems also to make a audible 'click'. The Boiler is hot and heats water okay. We will check Header Tank (checked every year anyway). Could it be the Overheat Stat. as it seems - at a glance - that the stats are overiding each other? I supose that there is an outside chance that the Programmer/Timer maybe faulty but it is brand new and was working fine. If fault is diagnosed before answer is received here I will post our findings. All help gratefully received, many thanks in anticipation.
Yours...cold in Swindon!
Martyn R. November 2009
Answers will appear here when the question above is answered. (No answers have been added yet.) Can you help? Click here to add an answer.
Add
an answer
Can
you add an answer to this question? Complete the form below
...
Attempting
repairs can be dangerous.
In many instances work should only be undertaken by a qualified
professional. Ensure you have read our Small
Print page before using information supplied via this website.
Martyn R.
November 2009
Can
you add an answer to this question? Complete the form below
... 
2003 .