I'm having problems with the temperature(it doesn't seem to go above approx 30-40 degrees).The machine is oldish but I'm wondering if it's the termostat would it be worth repairing,either professionally or could it be done DIY.

My hot water, cold water comes through my hot water heater and my plumbing. There is a warm setting, hot setting and a cold setting. 30 to 40 would be lukewarm. If I want hot water I put it to that setting and its drawn off my hot water tank.

Tick