Need to make sure the winterisation valves are all in the correct position.
When you say no hot water, no you mean when you turn the faucet to the hot position, there is water coming out but it is not hot, or no water at all.
HWS have check valve on inlet and sometimes on outlet as well and they can collapse internally and block flow.
Outside shower turned on at the valves but off at the head can result in no hot water inside.
If operate the safety valve (carefully) iss there water coming out and is it hot
BTW a HWS starting up from dead cold should run for more than 10 minutes before it cuts out.
Tony Lee - International Grey Nomad. Picasa Album
- Travel Map
RVs. USA - Airstream Cutter; in Australia - MC8 40' DIY Coach conversion & OKA 4x4 MH; in Germany - Hobby Class C; in S America - F350 with 2500 10.6 Bigfoot camper