I have been getting boiling in my heat exchanger i have put cleaner through the system and add a magnetic sypon to collect all debris in system. But one thing i noticed when doing this is the pipe that is meant to be the return on the boiler is the pipe that gets hot 1st when the boiler fires up. does this mean the flow and return has been mixed up and is this an issue that needs addressing the boiler was fitted 3 years ago and up until the system had muck in it it worked ok.
Gloworm 15hxi boiler
- Thread starter guttsy
- Start date
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If fitted in reverse this can be dangerous on a regular boiler as safety stats monitor the flow. Your's also has a sensor on the return but not sure it'll work with a reverse temperature differential (eg. return over 20C higher than the flow). On the other note if your heat exchanger is blocked, you're unlikely to clear it in situ, it may have to come out. This is because it's not a continuous coil, so water will tend to 'short circuit' unblocked batches of coils.
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