- Reaction score
- 339
Evening all,
A job I am on as an aside the customer asked me to have a look at the heating/hot water system as the hot water is not heating up. It is an unvented system with vaillant boiler and combistore cylinder.
Anyway I tested up to the tank stat/cylinder control and found power up to it (terminal 1) but not going through it out to terminal 2 or terminal 3 if I turned the temperature down. So I've called vaillant to check I'm not being daft (always a good chance) and they say no the stat is faulty you need a new one.
Long story short the customer ordered a new stat, I replaced only to find the same problem, I scatched my head and rang vaillant again and they said that's unlucky you must have a 2nd faulty stat....got another one sent and same problem again.
Anyway I bypassed the stat and had the system running fine. Bit of a head banger, have tested across terminals 1, 2 and 3 but nothing. Any thoughts welcome!
A job I am on as an aside the customer asked me to have a look at the heating/hot water system as the hot water is not heating up. It is an unvented system with vaillant boiler and combistore cylinder.
Anyway I tested up to the tank stat/cylinder control and found power up to it (terminal 1) but not going through it out to terminal 2 or terminal 3 if I turned the temperature down. So I've called vaillant to check I'm not being daft (always a good chance) and they say no the stat is faulty you need a new one.
Long story short the customer ordered a new stat, I replaced only to find the same problem, I scatched my head and rang vaillant again and they said that's unlucky you must have a 2nd faulty stat....got another one sent and same problem again.
Anyway I bypassed the stat and had the system running fine. Bit of a head banger, have tested across terminals 1, 2 and 3 but nothing. Any thoughts welcome!