Boiler is on and pump running when in off mode

jaybee2 said:

I have a British Gas Boiler 330 located in a garage. The Honeywell 2 channel switch is in twice mode but is currently in "down" period.
The boiler is fired and CH pump is running the weather is cold outside below 2 degrees.
I have a Drayton valve which has H W and Mid positions.

I have tried to run a fan heater in the garage to warm up the boiler but the systems is still running. A friend has advised I should have two separate valves on the replacement boiler system not the one original valve.

Please assist.....

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lcgs said:

Could be frost protection.

Do you have a thermostat in the garage that looks just like a room stat but is labeled from3 to 10 degs.

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Tipper said:

Could also be a failed motorised valve. May need a new motorhead.

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I hope not as that was changed only last week. From the original British Gas Mid position valve to a same design Drayton design.

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ChrisR said:

Well if you haven't got a separate frost stat, it's all on because of something else!

If you've got an OLD BG 330 it's an Ideal Classic, no internal frost stat.
If it's a later one, digital display under front flap. it's a Glowworm Flexicom, internal frost stat comes on at 3º.

Once the boiler's above the set temp, it should turn off.

If it's NOT that, it'll be a stuck valve: For CH the 3 way valve opens and presses a switch inside to bring the boiler/pump on. The valve, or just the switch, can be stuck.

I hope not as that was changed only last week. From the original British Gas Mid position valve to a same design Drayton design.

Click to expand...

If they didn't drain down and change the whole valve, it could be the valve sticking. Often "one" just changes a head with the switch in .

The Pipe stat you've seen is for use with a conventional frost stat. Frost stat brings the boiler on and the pipe stat turns it off again when the return pipe is up to some temperature like 10 degrees, well above freezing but not enough to bother the house.

Click to expand...

jaybee2 said:

ChrisR said:

Well if you haven't got a separate frost stat, it's all on because of something else!

If you've got an OLD BG 330 it's an Ideal Classic, no internal frost stat.
If it's a later one, digital display under front flap. it's a Glowworm Flexicom, internal frost stat comes on at 3º.

Once the boiler's above the set temp, it should turn off.

If it's NOT that, it'll be a stuck valve: For CH the 3 way valve opens and presses a switch inside to bring the boiler/pump on. The valve, or just the switch, can be stuck.

I hope not as that was changed only last week. From the original British Gas Mid position valve to a same design Drayton design.

Click to expand...

If they didn't drain down and change the whole valve, it could be the valve sticking. Often "one" just changes a head with the switch in .

The Pipe stat you've seen is for use with a conventional frost stat. Frost stat brings the boiler on and the pipe stat turns it off again when the return pipe is up to some temperature like 10 degrees, well above freezing but not enough to bother the house.

Click to expand...

The emergency plumber did a twist with the pliers on the valve but it did visually look stiff to me. The house was empty unused for 6 months prior to me moving in.
The BG 330 does have digital display hence Glow warm model.
So as the frost stat internal is set at 3 degrees my system will run for a period of time just until it is higher than 3 degrees, ( I assume it will run the CH). This would not normally be all the time as at present?
Hence the sticking valve issue. Would you recommend one of the pipe stats I guess this would also stop the system from running all the time too.
I did remove the orange wire today and the motorhead did move to other position, but later when I switched the Hot water channel to on, on the timer no response just sat in Heating position.
A friend plumber suggested two separte valves would this be better than the one?

Click to expand...

jaybee2 said:

jaybee2 said:

ChrisR said:

Well if you haven't got a separate frost stat, it's all on because of something else!

If you've got an OLD BG 330 it's an Ideal Classic, no internal frost stat.
If it's a later one, digital display under front flap. it's a Glowworm Flexicom, internal frost stat comes on at 3º.

Once the boiler's above the set temp, it should turn off.

If it's NOT that, it'll be a stuck valve: For CH the 3 way valve opens and presses a switch inside to bring the boiler/pump on. The valve, or just the switch, can be stuck.

I hope not as that was changed only last week. From the original British Gas Mid position valve to a same design Drayton design.

Click to expand...

If they didn't drain down and change the whole valve, it could be the valve sticking. Often "one" just changes a head with the switch in .

The Pipe stat you've seen is for use with a conventional frost stat. Frost stat brings the boiler on and the pipe stat turns it off again when the return pipe is up to some temperature like 10 degrees, well above freezing but not enough to bother the house.

Click to expand...

The emergency plumber did a twist with the pliers on the valve but it did visually look stiff to me. The house was empty unused for 6 months prior to me moving in.
The BG 330 does have digital display hence Glow warm model.
So as the frost stat internal is set at 3 degrees my system will run for a period of time just until it is higher than 3 degrees, ( I assume it will run the CH). This would not normally be all the time as at present?
Hence the sticking valve issue. Would you recommend one of the pipe stats I guess this would also stop the system from running all the time too.
I did remove the orange wire today and the motorhead did move to other position, but later when I switched the Hot water channel to on, on the timer no response just sat in Heating position.
A friend plumber suggested two separte valves would this be better than the one?

Click to expand...

Tonight I have turned boiler back down to the min position. Boiler turned off, pump ran on to clear water then stopped. The timers are in off position.

I turned Hot water timer to ON and the mis position valved moved to W.
I then turned it back off and it is now in Mid position. Would this indicate the Valve is operating ok?

Click to expand...