Truma questions: sneezing and insulation

[Louisesjpp]

My Truma gas heater sneezes from time to time, a bit like the sound of a compressor pressure relief valve opening. I think it only started after converting to GasLow. It works OK, but I'd like to know if it should sneeze or not.

The Truma cupboard gets hot. That's not ideal in hot weather. I'm wondering about piling some insulation round it, but don't know if a) there will be any air intakes inside the cupboard (but believing they should only be outside) and b) if this may lead to overheating.

 

[Speve]

Your Truma needs air around it to circulate sounds like your boiler water temperature is a bit hot and it’s venting
we have an air vent in the panel surrounding it

 

[Louisesjpp]

Your Truma needs air around it to circulate sounds like your boiler water temperature is a bit hot and it’s venting
we have an air vent in the panel surrounding it

We use it on eco and it can be scalding hot.

 

[Speve]

We use it on eco and it can be scalding hot.

I think it would be wise to get a Truma technician to check it out