Cold rads but water tank hot - Possible causes?

[hoppyfrog]

Glowworm Micron 80FF boiler, boiler fires up (for very short periods, a few seconds) but does not heat the radiators but it heats the hot water tank. What could the possible problem be?

Thanks

 

[doitmyself]

Could be several things:

Programmer/Timer
Room thermostat
Motorized valve

It's a case of checking each one.

Do you have a multimeter (and know how to use it)?

 

[hoppyfrog]

Could be several things:

Programmer/Timer
Room thermostat
Motorized valve

It's a case of checking each one.

Do you have a multimeter (and know how to use it)?

I dont have a multimeter but I can get one and figure out how to use it. So I need to check the three things you've listed to see if they're dead? I've currently got a guy on site doing a powerflush so I can use him to help me figure things out, he doesnt troubleshoot boilers but he's been helpful.

 

[doitmyself]

I dont have a multimeter but I can get one and figure out how to use it. So I need to check the three things you've listed to see if they're dead? I've currently got a guy on site doing a powerflush so I can use him to help me figure things out, he doesnt troubleshoot boilers but he's been helpful.

Be very careful. You will be measuring AC voltages - about 240Vac - which can give you a nasty shock.

All the components hopefully wire into a single junction box, aka wiring centre.

If you tell me how many motorized valves you have, and which type, I can give you more instructions.

 

[SafeGasInstall]

we should not encourage any incompetent person to cary on work with electrics or gas !!!!

OP pleas call a local heating engineer to sort out your problem

 

[hoppyfrog]

we should not encourage any incompetent person to cary on work with electrics or gas !!!!

OP pleas call a local heating engineer to sort out your problem

I'm not incompetent Mr safegasinstall !

Anyway, I had a powerflush done today, and afterwards the system started working again. V strange.

 

[hoppyfrog]

Be very careful. You will be measuring AC voltages - about 240Vac - which can give you a nasty shock.

All the components hopefully wire into a single junction box, aka wiring centre.

If you tell me how many motorized valves you have, and which type, I can give you more instructions.

View attachment 15874View attachment 15875

Thanks for this, if the boiler dies again I'll ask for help

 

[Dotty]

I'm not incompetent Mr safegasinstall !

Anyway, I had a powerflush done today, and afterwards the system started working again. V strange.

Not incompetent? And yet you will have to figure out how to use a multimeter....

I dont have a multimeter but I can get one and figure out how to use it. So I need to check the three things you've listed to see if they're dead? I've currently got a guy on site doing a powerflush so I can use him to help me figure things out, he doesnt troubleshoot boilers but he's been helpful.

If it walks like a duck and quacks like a duck........

Thread closed.

And doitmyself. Check the OP's competence before offering advice in future or you and I will fall out!