CH now not working again after new batteries fitted in thermostat

[ipbr21054]

My sister last night said that her central heating wasnt working.
What she means is the radiators are all cold.

She looked at the timer / thermostat item on the wall if thats the correct name for it & said the battery icon was flashing.
She fitted new batteries & set the time etc again then in 10 minutes time she messaged me to say the radiators are now getting warm.

DANFOSS TP5E

This morning she messaged me to say that the display had changed back to 23.25
She also sent me a short video clip & i see the battery icon was flashing again.

Attached is the item in question.
Has anybody come across this before & what steps should now be taken.

It seemed last night when batteries & time set etc sorted itself out but unsure of this mornings actions

 

[oldbutnotdead]

First q has to be how new are those batteries? First action is for her to head for the shop and buy a pack of batteries (Aldi price on Duracell is ok at the mo) and try them. 99% certain that'll fix the problem

 

[ipbr21054]

I asked her that and she said she had just bought them.
I will tell her to go buy Duracell and try.

She also said this.
There are more than 24 hours & more than 59 minutes.

Make any sense to you

 

[oldbutnotdead]

I asked her that and she said she had just bought them.
I will tell her to go buy Duracell and try.

She also said this.
There are more than 24 hours & more than 59 minutes.

Make any sense to you

Some of those controllers need a reset after a battery change- annoying cos you lose your custom programming but tis what it is.
Danfoss TP5EManual here

 

[Old Salt]

I asked her that and she said she had just bought them.
I will tell her to go buy Duracell and try.

She also said this.
There are more than 24 hours & more than 59 minutes.

Make any sense to you

Obviously not the right settings then

 

[Alec_t]

Sounds like a factory reset is needed.
From the manual

 

[Deleted member 267285]

As above, need decent quality alkaline batteries, not cheap zinc batteries

 

[Harry Bloomfield]

It seemed last night when batteries & time set etc sorted itself out but unsure of this mornings actions

Those Kodak batteries are about as cheap, and useless as can be bought. Pound shop?

Suggest she buys and fits some decent ones. For low cost batteries, which seem OK, I buy JCB alkaline batteries, from Home Bargains.

 

[JohnD]

Aldi own-brand alkaline batteries are best value, and very good. In "Which" tests, Duracell are almost as good as Aldi, but twice the price. Kodak are a "don't buy."

It is an advantage to use a nylon toothbrush with a trace of WD40 (spray a tiny bit into a saucer and rub the brush on it) to clean the terminals in the device, and the ends of the batteries, each time you change them. Do not spray into the device. The amount of dirt should be imperceptible, but you can wipe it away with a tissue. You can also spin the batteries a few times with your thumb to rub the terminals together.

Wireless controls are rather prone to losing contact and needing to be re-connected.

Surprisingly, Duracell are not quite the same size as industry standard, and in some cases they do not fit devices perfectly.

 

[SUNRAY]

Those Kodak batteries are about as cheap, and useless as can be bought. Pound shop?

Suggest she buys and fits some decent ones. For low cost batteries, which seem OK, I buy JCB alkaline batteries, from Home Bargains.

I had a gas inspection in one of our rental properties recenty which highlighted the CO alarm was 4 years out of date (So much for annual inspections arranged by rental agencies where the CO box has been ticked). I headed on over armed with two alarms and six 9V batteries (for smoke detectors) raring to put things right, to find it dated 2010 and a 7 year life so actually 7 years out of date. The replacement took a few seconds. Checked the two smoke alarms, one failed so replaced both batteries... All Good.

Round the corner the next property the CO alarm was dated 2017 so the 7 years was up in June, replaced and checked smokes and again one failed - replaced both batteries.

Third property no gas so no CO alarm, checked smokes and both passed but one started beeping flat battery. both replaced.

So the reason for this post: both failed smokes contained Duracells, dated 2023 and 2024, the one beeping aftertest was an aerocell -2025 and the three working alarms being JCB dated 2014, 2017 & 2020 the replacements are JCB dated 2029 so should be good to at least 2033

Oh and I forgot to mention JCB alkiline are only £2.99 for a pack of 3 in Home Bargains.

I purchased 6 packs as we are heading to radiomic season.

 

[Harry Bloomfield]

Oh and I forgot to mention JCB alkiline are only £2.99 for a pack of 3 in Home Bargains.

Those are the PP3's. I use them in various instruments, no complaints from me, at all..

 

[SUNRAY]

Those are the PP3's. I use them in various instruments,

Sorry no I didn't specify which size batteries I referred to but hopefully most realised which batteries are used in smoke detectors.

no complaints from me, at all..

Likewise but until that simple little exercise I didn't realise how good they are, including a direct comparison with possibly the top brand battery.

 

[ericmark]

Yes, season for battery changing, 20 x AA batteries in my central heating, the eQ-3 TRV batteries run out first, the Energenie TRV can go nearly two years, the Kasa TRV and Wiser wall thermostat are quite new.

I was careful not to select a main thermostat that needed batteries, however I found where the wires went in the hall was not the best location, so have a second one in parallel, however both the bases, have the option to press a button to turn them on.

I tend to use Duracell as don't want them to leak, and tend to buy them all at the same time, yet they do not all fail together, old house was the worst, this would show icon for failed, well after it had reached the point where it failed to work. This however was known to run for 5 years on a set.

Clearly, it must take more power to work a relay or motor, than to just send a wireless signal. I note my Nest says, ⁣ ⁣ but since it does not say what volts the battery should be, rather pointless. Energenie TRV states volts, but eQ-3 just says change battery, Kasa shows 1 to 4 bars in battery icon, and Wiser also a picture of a green battery, so using rechargeable don't really know when it needs changing.

eQ3 says before battery fails it will move valve to wide open, others don't tell me.

 

[RandomGrinch]

I note my Nest says, ⁣ ⁣ but since it does not say what volts the battery should be, rather pointless.

...a 3.7V lithium polymer cell.
It can stand a maximum charging voltage of 4.2V.

 

[robinbanks]

...a 3.7V lithium polymer cell.
It can stand a maximum charging voltage of 4.2V.

Oh you had to use the L word didn't you.. One of the naysayers from the EV worth thread will be along shortly to advise on how the house is due to burn down imminently