Random synced temperature spikes in multiple Neostat v2s
We have a 2yr old new build zoned ASHP installation with UFH to the ground floor and radiators upstairs. There is no MVHR. Control is via multiple Neostat v2s, one for upstairs and one per zone downstairs. I’ve recently added a Heatmiser Hub to get the Neostats online and have been monitoring the measured temps in Home Assistant.
This monitoring has uncovered a strange fault where at random times all the Neostats will simultaneously show a 1-2 degree spike in temperature with a random duration. The spikes can occur at any time and are sufficient to stop the zones heating.
As far as I can tell the spikes are not correlated with anything else in the property, with any electrical variations of voltage/load or with any external factors such as the weather. A different WiFi connected sensor mounted adjacent to one of the units is not showing any spikes.
Has anyone else seen this before? My working theory is that something via the network is triggering a greater dissipation in the units which is distorting the measured temperature as it seems that these units are prone to internal heating.
My Neostats controlling the zones downstairs (7 of them) do exactly the same thing, usually in the late afternoon or early evening. We also have a 3 years old new build with ASHP and underfloor heating downstairs and radiators upstairs.
However, they are not connected to the NeoStat hub. It is just as if the Neostats suddenly act in unison and we have been very puzzled by it. As you say, it is quite random and usually lasts for at most 30 minutes.
- 24 Forums
- 1,413 Topics
- 29.7 K Posts
- 42 Online
- 1,199 Members
Join Us!
Latest Posts
-
RE: Gas Combi to ASHP - Making sense of survey results and proposal.
@irmartini Hi, Why not lower your gas boiler flow temp ...
By JEH , 11 hours ago
-
In an ideal world a heat pump unit would contain two co...
By Derek M , 12 hours ago
-
RE: ASHP Advice: High Temperature vs. Low Temperature Heat Pump For Microbore
@jamespa I fully agree with James that a HT heat pump...
By Derek M , 14 hours ago
-
RE: Installing your own ASHP - DIY
@tomasmcguinness Have you been able to perform any sani...
By IanMK13 , 18 hours ago
-
-
RE: Viessmann Vitocal 250-A in the UK
For reference, I have a 10 kWh Viessmann 151-A installe...
By GC61 , 20 hours ago
-
RE: Vaillant Arotherm Settings for New Installation
@drew-pa Ah thanks. Good to know I dont have a misconce...
By bontwoody , 20 hours ago
-
RE: Aira Heat Pump: Stylish Scandinavian Heating
On the whole marketing claims vs reality on performance...
By GunboatDiplomat , 20 hours ago
-
RE: Microbore Central Heating Plumbing, will it be a barrier / pain?
@mattc All the existing (designed for T50) radiators ar...
By IanMK13 , 1 day ago
-
The temporary fix has reconnected about 60% of users, a...
By Abernyte , 2 days ago
-
RE: What is Wrong with our Heat Pump Installation?
Having to run the heat pump during the summer for DHW s...
By Toodles , 2 days ago
-
Issues with Vaillant connectivity via the MyCONNECT gateway
I'm sensing a variety of issues with Vaillant connectiv...
By dr_dongle , 2 days ago
-
Interesting heat pumps installations
Thought it would be cool to share photos of interesting...
By Mars , 2 days ago
-
RE: Say hello and introduce yourself
@Toodles That's very interesting to hear, thanks. I ha...
By dr_dongle , 2 days ago
-
RE: Massive Electricity Cost for Running My Air Source Heat Pump
@allyfish In fairness installer has replied stra...
By Holts , 2 days ago
-
-
RE: Are Solar Diverters Necessary for Homes with ASHPs and Solar PV?
@zzxap19 that's a fair point. With the eddi, is it poss...
By Mars , 3 days ago
-
RE: Delivering a smart and secure electricity system: government consultation
"I don't think I'll need to refer to past iterations of...
By eggnchips , 3 days ago
-
RE: Error on Immersun – Error 8 Load Short Circuit
@julesmp8 fingers crossed. I have to say our Immersu...
By Mars , 4 days ago
-
Latest Topics
-
Interesting heat pumps installations
By Mars 2 days ago
-
What is Wrong with our Heat Pump Installation?
By Mars 3 days ago
-
Fossil Fuel Fired Heating v Heat Pump?
By Toodles 3 days ago
-
Viessmann Vitocal 250-A in the UK
By treehugger 4 days ago
-
By HUBB84 7 days ago
-
By jswhite 7 days ago