Alwayslearning22

My system came out of a hot water cycle last night and the spent the next hour defrosting every 15 mins. It just wasn’t able to get the room temp back up without really struggling. Set at a 40 flow and sounded like it was going to explode. Took ages to settle down.

I’ve came down nights to see the flow at 34 because then thing is so frosted up it’s not getting air. For some strange reason it could take over an hour of this before it defrosts. Temp didn’t drop too much inside even at 34.

My heat pump was popping in and out of defrost all day. Although it was heavy fog here.

Sorry i should of mentioned, i have only radiators.

Should I reduce the flow to 37 degrees to try and reduce defrost cycles?

Thanks for that information I’ve always wanted to learn to do a heat loss calculation. I believed it was much more difficult. I’ll be giving that a go tomorrow. one thing i hate about heat pumps is the frosting up

I can’t make any improvements as it’s well enough insulated. Maybe I can improve by fixing a few holes on the air tightness barrier for pipes and cables that weren’t sealed by the trades. it keeps the house warm enough, it just annoys me that it can’t hold the room temperature when it’s this cold out. Its also extremely noisy during operation and when it goes into its defrost cycles.

It’s reassuring to know my defrost cycles seem to be normal then. I thought it was to often as it struggles to get flow back up again. im not sure of my heat loss. my house is a new build timber frame. sounds like it’s undersized going by yours?

I’m in the east of Ireland so not the coldest of places. Currently it’s 1 degree but past few nights it was minus 1 or colder and it performed horribly could not maintain building heat loss. yes, seems to be blowing ok for the 20 mins it’s not frozen. id never get it above 42, only time it can manage that is when it’s heating hot water and That’s because the pipe run is short. System is 2 years old and never worked properly I think

Hi guys, I’ve a 4.3kw split hitachi air to water heat pump. My house is around 120sqm with this recent cold weather, I’m beginning to think that my heat pump is undersized. It’s constantly frozen even after a defrosting fully it tries to get itself to a 40 flow and then just freezes up again. is there anything I can do to stop it freezing up? Maybe lowering flow temp? it’s on weather comp at the moment set for 42. Never reaches that though.

Could of been haha. I’m praying it was a bird My wife will have a nervous breakdown if we have mice

Unfortunately I didn’t take a picture before i removed it. I can take a picture of the hole though?

No I don’t think it was mud. Definitely looked like a lump of chocolate. I plugged the hole wit some paper to see if it’s being used by a mouse

It was a big enough lump too looked like chocolate or something. I live in a terraced timberframe house so I hope it isn’t a mouse or he will be in the house in no time.

Anyone ever come across a lump of food pushed into a brick mortar joint? it’s as if a mouse tried to carry food into it. it’s about 8 feet up the wall. Very strange

Does anyone know what this blue baton thing is under the brick, where the mortar joint is supposed to be? It’s a terraced house and its where the houses join. is it some sort of cavity closer? Theres no mortar in the joint. It’s not a dpc

Never thought of That to be honest. Could do that. Although I’m thinking is the unused one venting my system. Would it have a negative effect?

It rises to the bedroom and is capped off. I had a look at it last year and it looked like a cap on it. Must be an AAV? Would it be standard practice to put an AAV on an unused stack like that?

Heres a plumbing layout if thats any use to you guys?

There’s no smells coming from the pipe either

I have listened for noises but nothing obvious. I’ll check again tonight and give it a good smell when the toilet had been flushed. This waste pipe in runs out to a trapped gully. I don’t know if that makes a difference

I’d say about 2 hours to fill a cup. I had a heating engineer out to fix it today. I also bought. Dehumidifiers from screw fix might be too small though? It’s a 12lt one

It’s on the ground floor Nick

Had a listen there nothing obvious. I can hear the sink drain from the bathroom. So that must connect to the washing machine drain. it’s weird that the smell goes away after a few mins. I checked the unused soil stack it’s capped off has no Aav.

I see a fast dripping but I can’t tell where it’s leaking from. It’s a drip every second. Bout a week it’s been going on I’d say. only some of the grout lines are have water seeping out. Maybe a void in those areas? As some of the other posters were saying.