Just had heat pump installed, cold air in heat mode..

Forums › Home Workshop DIY › Just had heat pump installed, cold air in heat mode..

sdavisnz

1015 posts

Uber Geek

Trusted

#198792 22-Jul-2016 19:14

Hi, I just had a Mitsubishi heat pump installed

I'm in Auckland

I'm getting cold air coming out of the heat pump in heat mode.

any ideas before I call the installer???

Cheers

Steve

Voice gives context

1 | 2

8953 posts

Uber Geek

#1597021 22-Jul-2016 19:53

Always cold, or just sometimes? Actual cold (chilled), or just room temp? Does it work in cool mode?

scuwp

3885 posts

Uber Geek

#1597022 22-Jul-2016 19:57

Yes, don't expect them to pump out blistering hot air, that's not how they work. Turn the temp right up and put it on full. If it doesn't pump out warm air after maybe 5 minutes I would say you have a problem. Assuming of course you have read the controllers instructions...

Lazy is such an ugly word, I prefer to call it selective participation

Jase2985

13457 posts

Uber Geek

ID Verified

Lifetime subscriber

#1597023 22-Jul-2016 20:00

if its when your first turn it on it may be in defrost mode and should start heating after 5-10 minutes

Gilco2

1556 posts

Uber Geek

#1597033 22-Jul-2016 20:14

Our Mitsubishi heat pump 10 years old pumps cold air once it reaches temp. Always feel cold draught from the cool air it pumps out. When temp drops it then pumps hot air again. First thing in morning anytime below 5 deg it ices up after half hour then takes half hour to hour deicing so you sit in cold.

HTPC Intel Pentium G3258 cpu, Gigabyte H97n-wifi motherboard, , 8GB DDR3 ram, onboard graphics. Hauppuage HVR 5500 tuner, Silverstone LC16M case, Windows 10 pro 64 bit using Nextpvr and Kodi

blakamin

4431 posts

Uber Geek
Inactive user

#1597034 22-Jul-2016 20:17

scuwp:

Yes, don't expect them to pump out blistering hot air, that's not how they work. Turn the temp right up and put it on full. If it doesn't pump out warm air after maybe 5 minutes I would say you have a problem. Assuming of course you have read the controllers instructions...

This ^^^^

timmmay

20574 posts

Uber Geek

Trusted

Lifetime subscriber

#1597038 22-Jul-2016 20:26

Make sure it's in heat mode, not auto. I have two heat pumps, Daikin and Fujitsu, neither ever blow cold air in heat mode. Maybe it takes a few minutes to warm up, but if it's not that it could be faulty.

sdavisnz

1015 posts

Uber Geek

Trusted

#1597042 22-Jul-2016 21:00

Yea, installer is coming back tomorrow to have a look,

I'll post what the solution is tomorrow.

Thanks for the replies though.

Voice gives context

Equinox IT

Cloud spending continues to surge globally, but most organisations haven’t made the changes necessary to maximise the value and cost-efficiency benefits of their cloud investments. Download the whitepaper From Overspend to Advantage now.

Jase2985

13457 posts

Uber Geek

ID Verified

Lifetime subscriber

#1597048 22-Jul-2016 21:31

you havent really answered anyone questions

Batman

Mad Scientist
29760 posts

Uber Geek

Trusted

Lifetime subscriber

#1597072 22-Jul-2016 22:52

Mode needs to be on heat
Fan needs to be on auto
In general i find Mitsubishi and Daikin pumps hot air regardless but my Fujitsu heatpump won't pump hot air unless fan is on auto

Jase2985

13457 posts

Uber Geek

ID Verified

Lifetime subscriber

#1597114 23-Jul-2016 06:20

joker97: but my Fujitsu heatpump won't pump hot air unless fan is on auto

its either broken or a highly stupid heatpump, fan speed should have zero influence on weather its heating or cooling

muppet

2566 posts

Uber Geek

Trusted

#1597115 23-Jul-2016 06:24

I'll also have a wild guess with no idea.

You have a dead rat stuck in the pipe.

Hope this helps.

tchart

2379 posts

Uber Geek

ID Verified

Trusted

#1597119 23-Jul-2016 07:38

Jase2985:
joker97: but my Fujitsu heatpump won't pump hot air unless fan is on auto

its either broken or a highly stupid heatpump, fan speed should have zero influence on weather its heating or cooling

Kind of agree with both of you.

We find auto is best as it regulates the fan speed with the target temperature. Having the fan on full blast generally results in "cold" air being blown after the target temperature is reached.

Ours feels cold when;

1) The fan is not on auto and the room is warm.
2) I forgot to turn "eco" mode off (we use this overnight)
3) It's on the wrong mode (eg cool or fan only)

timmmay

20574 posts

Uber Geek

Trusted

Lifetime subscriber

#1597137 23-Jul-2016 08:40

Jase2985:

joker97: but my Fujitsu heatpump won't pump hot air unless fan is on auto

its either broken or a highly stupid heatpump, fan speed should have zero influence on weather its heating or cooling

Not auto fan, auto mode. You should select the heat or cool modes manually, rather than auto, as auto can get confused, cycle, and waste power.

Jase2985

13457 posts

Uber Geek

ID Verified

Lifetime subscriber

#1597159 23-Jul-2016 09:45

it says "fan is on auto" so hes saying his heat pump wont pump hot air when the fan is on auto.

it should and like others mentioned it will only stop pumping hot air when it reaches temp.

mine just ramps the fan right down and its still blowing warm air.

Boeingflyer

643 posts

Ultimate Geek

Trusted

#1597191 23-Jul-2016 11:21

It sounds silly, but what happens if you put it on Cold, does hot air come out? I'm not even sure if its possible to reverse something on a heat pump.

1 | 2