Vaillant ecotec plus 837 pump wake mode

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15 Dec 2019
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I’ve got a ecotec and I’ve got no problems with the hot water or central heating. The problem I have is it never turns off for more than 3 minutes, the water pump runs all the time with S07 pump wake displayed and I’ve got no idea why. Had the boiler moved last year when I had work done and I had a few problems with the controller which is a Honeywell evo home, they had to come back a couple of times to get the wiring correct. I know it’s got a frost protection as the boiler is in the garage but the pump wake will run when rad and water temps are still showing high so I didn’t know if it could be a faulty temperature censor or something??? Any help would be great full thanks
 
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What time is set on the boiler for pump overrun?
 
I honestly have no idea or where to find that information
 
It's in the manual. One of the D settings.
 
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Just moved in to the house last year so will have to dig through the files which were left to find the manual. This problem has only started in the last few days so no one has changed any setting lately if that helps
 
Go online and download the installation and user manual
 
I’ve found 1 which say factory setting is 5 mins but can be set to 1 hour. As my room is above the boiler I can hear it run for around 7 minutes then off for 3 mins then back on for 7
 
You didn't say that in the original post. S07 means pump overrun anf the time it runs can be set in the boiler control panel.
 
You mentioned pump overrun I thought that was a setting which may fix my problem. On my boiler S07 is pump wake mode which is on off on off
 
My overrun is set to 5 minutes

Im a bit lost, your overrun is 5 mins, your op states it doesn’t turn off for more than 3 mins. What’s the issue? Is the pump running all the time, or is it running for the length of overrun and then stopping? Do you want to decrease the pump overrun?
 
So the central heating runs fine rads hot and then turns off around 10. We go to bed and for hours on end you can hear the pump kicking in and out on for 6mims off for 3mins On off on off all the time. when I checked the boiler when it was on for 6 mins it says heating mode pump wake? So it’s not turning the burner on it’s just pumping 30 deg water around
 

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