Navien Combi Boiler

gurbinder911

I have Navien NCB-240/130H Installed. There is no code, Error, leakage or weird sound. Also hot water supply is great. I have In-floor heat in my triple garage which is set to 22 degree celsius but it does not go more than 14 degree. Through out the summer I had it set at 5 degree (Off). Now I crank it to 22 degree but no heat more than 14 degree.

Temp set for SH is 180 degree fahrenheit (Max)

I have changed the batteries on thermostat and it works well.

Is there any setting needs to be adjusted ???

Jamie Hall

What is the outside temperature? I assume that you are measuring air temperature?

What insulation is under the slab in the garage? Any? And for how long have you been running trying to get the temperature up?

What is the return temperature from the slab?

STEAM DOCTOR

Need a bit more history. Did it ever work properly? Is the boiler new? Is the system in the basement new? Any changes?

gurbinder911

@Jamie Hall Currently outside temperature at day time is between 1 to 6 degree celsius and night time is around -9 to -5 degree Celsius.

Yes the thermostat in my garage is measuring air temperature. I am keeping my garage close at all time but the temperature is not resing beyond 14 degee Celsius. I have notice the Thermostat temperature between 12 and 14 degree through out the last 2 week.

There is no insulation under the garage. I am trying to get the garage temperature to 22 degree since 2 weeks now.

Combi boiler kick me back to home page when I attempt to look for return / Supply temperature.

gurbinder911

@STEAM DOCTOR Yes the Infloor heat was working perfectly last year. I set the temperature to 5 degree (Lowest temperature thermostat allows) when winter was over in last June. Now I raised it to 22 degree and it does not go behond 12 degree.

My house was built in 2021, This Navien Combi boiler is 3 years old. I have the infloor heat in my garage.

No changes at all, DHW works perfectly

neilc

so is this just the garage not heating, or the whole house?