Thermostat with oil heating

reeac

marty2be2000 wrote: »

I've got oil heating and one those basic thermostats in the rented house.


I leave my heating on 24/7 during the winter . I found that letting the house cool down and then using the boiler it can take many hours to get the house back to temperature, thus negating any saving made by having it switched off when I am not in (boiler output set to max water temperature).

That old chestnut again. Please believe me: by switching the heating off you can ONLY save heat ...it will never cost you more. Reason? Your rate of heat loss ( and therefore rate of fuel consumption to replenish it) is proportional to the temp. Difference between indoors and outside. By turning off the heat when it's acceptable to do so e.g at nighttime or if you're out during the day you will be allowing the house to cool down, thus reducing the inside/outside temp. Difference and thus the rate of heat loss. It can never use more fuel than you've saved to bring the house up to temp. Again.

G_M

In one sense, whether the hall thermostat is accurate does not matter, as long as it is actually turning the boiler on/off when the air temp reaches what it thinks is what you want.

If you find the stat is always displaying 5 degrees lower than the monitor (and /or 5 below actual temp), then just set the stat 5 degrees higher!

The stat will then switch on the boiler whenever the displayed temp falls below 24 (instead of 19). Experiment till you find the stat is keeping the house at the cosy temperature you want. What it actually displays is irrelevant as long as it controls the system to your satisfaction.......

If the stat is actually bust, and does not switch the boiler on/off at all, then you need a new stat!

pc10

Still struggling with this!


Yesterday I had the boiler set at the lowest setting all day and night.


Thermostat was set to 10 degrees.


Energy monitor and another thermometer showed 19 degrees.


The problem was, it was too hot at night.


Tonight, I have the boiler turned up to the highest - temp shows as 20/21 degrees even with thermostat at 10.


So I think can now now safely say the thermostat does not work....can't I???


Thanks for the replies

reeac

pc10 wrote: »

Still struggling with this!



So I think can now now safely say the thermostat does not work....can't I???


Thanks for the replies

Certainly sounds as if the wall stat is faulty although in 40 years of c.h. Ownership I've never had one fail.
YOu can exercise some control over the heating using the programmer. I would suggest setting the boiler stat to mid way and the programmer to be off from, say 2230 until 0630 and, if the house is empty during weekdays, from 0930 until 1630. I can't prescribe exact times as I don't know your household routines but I'm sure that you get the idea? IF the faulty stat prevents the house from warming up to a satisfactory temp then increase the "on" times and vice versa.