interesting valiant fault

[Billy Bob Bob]

ok could not be arsed to fully work out whats going on just bypassed the RF stat for now,anyway original stat had failed fitted a new PROG Honeywell RF,boiler runs for a few mins in CH and crashes flashing up s.30?,trys a replacement RF same fault wiring's all ok thoughts people boiler works fine with the stat looped cant see 2 new ones being faulty its a ecotec 831 R1

 

[lame plumber]

sure this was mentioned in a previous thread on honeywell programmer recently

 

[Billy Bob Bob]

sure this was mentioned in a previous thread on honeywell programmer recently

cheers john will look this up