Altech Thermostat with RF ALTHCO14 Problem!

[ayrshirelass]

Hi Just wondering if anyone has come across similar problem with this thermostat. Had it fitted one year ago and has been working perfectly until this weekend.

The thermostat has been programmed to come on and off at set times but now the boiler is coming on when the themostat is showing that it is off (ie no flame showing) and not at a time when it is programmed to.

Last night it was on all night and house was like an oven at 4am this morning when I was out in shed where boiler is with a torch! Today have put in new batteries and tried resetting all the timings but the boiler is still coming on when it is supposed to be off.

Heeeeeelp

Any advice gratefully received.

 

[jackthom]

Hi if this unit is the one I'm thinking of is there an on / off switch on the receiver ?

I would first try switching that off to see if the heating also goes off.

If it does, at least you can be fairly confident it's the thermostat / receiver that's dodgy.

 

[picasso]

What boiler and do you have one of these ?

honeywell 2 port

• picasso
• 18 Oct 2010
• 31

or

honeywell 3 port

• picasso
• 18 Oct 2010
• 26

 

[ayrshirelass]

Hi if this unit is the one I'm thinking of is there an on / off switch on the receiver ?

I would first try switching that off to see if the heating also goes off.

If it does, at least you can be fairly confident it's the thermostat / receiver that's dodgy.

Yes there is an on/off switch and it does put off the heating - having just been putting on manually from there until I can figure out why the controller programming bit is not doing what it is supposed to do!

 

[ayrshirelass]

What boiler and do you have one of these ?

honeywell 2 port

• picasso
• 18 Oct 2010
• 31

or

honeywell 3 port

• picasso
• 18 Oct 2010
• 26

Boiler is a combi Vokera Unica HE - and can't see anything that looks similar to your pics.

 

[picasso]

Hi forget the valves in the pictures , they arent used with your combi, is the hot water dial set on preheat ? (the smiley face ) if it is put it on the economy setting (looks like a snowflake), if this solves the problem then the diverter valve wants looking at.

 

[jackthom]

Hi if this unit is the one I'm thinking of is there an on / off switch on the receiver ?

I would first try switching that off to see if the heating also goes off.

If it does, at least you can be fairly confident it's the thermostat / receiver that's dodgy.

Yes there is an on/off switch and it does put off the heating - having just been putting on manually from there until I can figure out why the controller programming bit is not doing what it is supposed to do!

Hi, can you check the times programmed in settings 4 and 5.

Apparently the time in 5 is for the frost setting and it should be exactly the same time and temperature as is in 4.

The temp in 4/5 should be set to something like 10C.

Sometimes if this is wrongly set it can affect the normal operation of the unit.

Lots of good info about this unit here, (it's a Salus clone )....

//www.diynot.com/forums/viewtopic.php?t=117777

.....See the post from LeedsPlumber

 

[picasso]

That will teach me to read the replies properly

 

[ayrshirelass]

Hi forget the valves in the pictures , they arent used with your combi, is the hot water dial set on preheat ? (the smiley face ) if it is put it on the economy setting (looks like a snowflake), if this solves the problem then the diverter valve wants looking at.

Unfortunately nothing quite as simple as that - has been set at economy all the time. But thanks for suggestion.

 

[ayrshirelass]

Hi if this unit is the one I'm thinking of is there an on / off switch on the receiver ?

I would first try switching that off to see if the heating also goes off.

If it does, at least you can be fairly confident it's the thermostat / receiver that's dodgy.

Yes there is an on/off switch and it does put off the heating - having just been putting on manually from there until I can figure out why the controller programming bit is not doing what it is supposed to do!

Hi, can you check the times programmed in settings 4 and 5.

Apparently the time in 5 is for the frost setting and it should be exactly the same time and temperature as is in 4.

The temp in 4/5 should be set to something like 10C.

Sometimes if this is wrongly set it can affect the normal operation of the unit.

Lots of good info about this unit here, (it's a Salus clone )....

//www.diynot.com/forums/viewtopic.php?t=117777

.....See the post from LeedsPlumber

Yes had a look at that post earlier - and yes setting 5 set same temp as setting 4 so still no joy I am afraid.

 

[jackthom]

Did you see the post about the 2 year guarantee for Salus products ?

Sorry but it's looking like a replacement might be needed.

 

[ayrshirelass]

Yes noticed guarantee - think you are probably right and will need to replace it. Will remember to turn heating off at receiver tonight before going to bed so don't have to do the midnight trek to the shed!

Thanks for replying. Much appreciated.

 

[surreylad1980]

can the channels on the unit be changed if perhaps it is picking up another signal ??