Hot Water & Heating Issues Caused by Faulty Temperature Reading
Hot Water & Heating Issues Caused by Faulty Temperature Reading
Hot Water & Heating Issues Caused by Faulty Temperature Reading
Hot Water & Heating Issues Caused by Faulty Temperature Reading
Hot Water & Heating Issues Caused by Faulty Temperature Reading
Loose cylinder probe caused incorrect temperature readings, leading to excessive hot water heating and poor heating performance.
Loose cylinder probe caused incorrect temperature readings, leading to excessive hot water heating and poor heating performance.
Loose cylinder probe caused incorrect temperature readings, leading to excessive hot water heating and poor heating performance.
Poor Heating & Limited Hot Water – Cylinder Temperature Probe Fault
The Problem
A homeowner reported that their hot water supply was inconsistent, and the heating performance wasn’t as expected.
Despite the system running regularly, the house wasn’t heating properly, and hot water behaviour didn’t seem right.
What I Found
During a review of the system, it became clear that the issue was related to how the hot water temperature was being measured.
The cylinder temperature probe had come loose from its pocket
The system was reading a lower temperature (around 38°C)
In reality, the stored water was significantly hotter
Because of this:
The heat pump believed the hot water was never reaching target temperature
It continued heating hot water for extended periods (up to the 90-minute limit)
Heating cycles were shortened, reducing overall heating performance
This imbalance meant the system was prioritising hot water unnecessarily, leaving the heating underperforming.
What I Changed
The fix itself was simple:
Guided the homeowner to correctly reposition the temperature probe into the cylinder pocket
Once the probe was reading accurately, the system could respond properly.
I also:
Reviewed and optimised the system settings
Enabled weather compensation instead of fixed flow temperature
The Outcome
With the temperature probe correctly positioned, the system was able to properly detect when hot water had reached the required temperature.
This allowed:
Hot water cycles to complete correctly
Heating to run as intended
Overall system balance to be restored
The homeowner experienced improved heating performance and a more consistent hot water supply.
Poor Heating & Limited Hot Water – Cylinder Temperature Probe Fault
The Problem
A homeowner reported that their hot water supply was inconsistent, and the heating performance wasn’t as expected.
Despite the system running regularly, the house wasn’t heating properly, and hot water behaviour didn’t seem right.
What I Found
During a review of the system, it became clear that the issue was related to how the hot water temperature was being measured.
The cylinder temperature probe had come loose from its pocket
The system was reading a lower temperature (around 38°C)
In reality, the stored water was significantly hotter
Because of this:
The heat pump believed the hot water was never reaching target temperature
It continued heating hot water for extended periods (up to the 90-minute limit)
Heating cycles were shortened, reducing overall heating performance
This imbalance meant the system was prioritising hot water unnecessarily, leaving the heating underperforming.
What I Changed
The fix itself was simple:
Guided the homeowner to correctly reposition the temperature probe into the cylinder pocket
Once the probe was reading accurately, the system could respond properly.
I also:
Reviewed and optimised the system settings
Enabled weather compensation instead of fixed flow temperature
The Outcome
With the temperature probe correctly positioned, the system was able to properly detect when hot water had reached the required temperature.
This allowed:
Hot water cycles to complete correctly
Heating to run as intended
Overall system balance to be restored
The homeowner experienced improved heating performance and a more consistent hot water supply.
Contact Us
Not Sure If We Can Help?
Not Sure If We Can Help?
Not Sure If We Can Help?
Not Sure If We Can Help?
Not Sure If We Can Help?
If you're unsure whether your heat pump problem can be diagnosed remotely, send us a short description of the issue and we’ll let you know if a technical review is worthwhile. No obligation.
If you're unsure whether your heat pump problem can be diagnosed remotely, send us a short description of the issue and we’ll let you know if a technical review is worthwhile. No obligation.
If you're unsure whether your heat pump problem can be diagnosed remotely, send us a short description of the issue and we’ll let you know if a technical review is worthwhile. No obligation.
