Why has Meter reading quadrupled after Gas Check on Vaillant Boiler?

[girlagogo]

I recently had a gas safety certificate check done by and my Vaillant Ecotec Pro24 boiler serviced/checked. However a month later and after taking a meter reading it showed that the amount used had nearly quadrupled since the previous month with no change in usage.

Hot water is only set at 50 degrees as usual and radiator temperature at 55. I am certain the guy doing the check has altered the settings but I don't know how to check or what to look for. Please help!

 

[cjg]

best thing is to call and ask him if he changed anything, and explain why you want to know, or if he will recheck your boiler

 

[ShaunCorbs]

Pre heat left on if it has a pre heat function ?

 

[Deleted member 120897]

Any dripping hot taps? Check for preheat too as per Shaun.

 

[Scott_D]

Have you now started using the heating or using it more?