replacing switchmaster sm600 with Horstmann channelplus H21

Postby sandys » Sun Jan 10, 2010 7:17 pm


Dear sirs/madam

The switchmaster had 13amp fuse fitted instead of 3amp. The switchmaster sm600 programmer stopped functioning, after replacing new fuse 3amp, all buttons fails to operate pump and boiler.

Bought Horstmann as replacement ( switchmaster not supplied any more).

After wiring as per their instructions, the switch, there is no start to pump or boiler, however the switch display information appears in display.

Is there wrong wiring as per horstmann information.

I need advice as to how to proceed to resolve the problem.

I look forward hearing from you, need pronto answer.


Kind Regards
Rank: Labourer
Progress to next rank:
Posts: 1
Joined: Sun Jan 10, 2010 6:23 pm


Simply Build It

Postby stoneyboy » Mon Jan 11, 2010 9:00 pm

Assuming you have wired the controller correctly you need to have a look for a motorised valve and see if this is working ok.
Rank: Project Manager
Posts: 2715
Joined: Wed Dec 10, 2008 6:44 pm

Display posts from previous
Sort by
Order by

  • DIY How to Project Guides

  • DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!


  • Related Topics