Hi all,
I'm a Gas Engineer, and new to fault diagnosis/repairs. I've measured the temperature on the flow/return pipes across my combi's secondary heat exchanger, with the hot bath tap on full. I have a Vaillant Ecomax 24 (year 2003). The flow was 70c, the return was 43.8c. I'd be interested to know what a good temperature is on the return pipe. No doubt I'll come across a few blocked heat exchangers in my future work. I presume if the return is too hot, that shows the heat transfer to the mains water hasn't taken place - hence a blocked heat exchanger. So ideally, the return temp should be as low as possible. Am I on the right track? Thanks for your advice, Jennie.
I'm a Gas Engineer, and new to fault diagnosis/repairs. I've measured the temperature on the flow/return pipes across my combi's secondary heat exchanger, with the hot bath tap on full. I have a Vaillant Ecomax 24 (year 2003). The flow was 70c, the return was 43.8c. I'd be interested to know what a good temperature is on the return pipe. No doubt I'll come across a few blocked heat exchangers in my future work. I presume if the return is too hot, that shows the heat transfer to the mains water hasn't taken place - hence a blocked heat exchanger. So ideally, the return temp should be as low as possible. Am I on the right track? Thanks for your advice, Jennie.