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I have a vaillant VRT 392f wireless thermostat that is showing the wrong room temp when i got in tonight it said 39 degrees is there a quick repair

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Posted on Jan 02, 2017

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SOURCE: how do I change language setting on Vaillant VRT 392f boiler remote control

here mate try this it worked for me.

Press left key

Scroll till page 15

Code will say 000 - should be 1000

Press right key once change first digit to 1

Press right key again

Will be on C1 in top right hand corner

Scroll through C pages till A1

Two A1 pages looking for one that says de..utch

Click right key once and change to d.. English

Posted on Nov 09, 2012

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Water pressure good, thermostat calling for heat boiler ignites , heats to 80, turns off, drops to 40 reignites - keeps this cycle going. temp sensor? return sensor? any help appreciated


the thermostat has an upper and lower setting at which point to turn the unit off and back on
most have a 10 degree variation between off and on so that a steady temp is maintained
check to see if the lower setting can be raised closer to the 80 degrees
if not consider a new thermostat with closer settings

Feb 13, 2016 | Water Water Heaters

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New Vaillant 360 eco plus boiler, takes almost 3/4s an hour for rads to come up to a decent temp. Hot water is fine. Called out install Engineer who is an excellent tradesman but he says everything


We have just had our old system boiler replaced with a vaillant ecotec plus 837 and sounds like a similar working operation to ours. At first I was a little concerned,but I was told by our installer that he was told by vaillant that these very latest boilers size the system on start up for about 10 mins, then take temperature to target flow which you set boiler at. So even by setting target flow temperature very high you still get the initial sizing cycle, which ours was about 30-35c temp. These boilers seem to run biased for efficiency as after a while they modulate the boiler burner down and the radiators run more on the side of warm than really hot like the old type boilers. You also get better efficiency as at lower temperature the boiler condenses better. You will also find you get a more constant temperature in your home rather than over shoots. I was concerned at first, shame there was no info/explanation in user manual as people do need to know that this is normal operation. We are used to ours now, took a month and by the way these boilers can make a creaking noise but was told this normal expansion/ contraction but annoying when sited in bedroom cupboard. Best of luck!

Oct 27, 2012 | Water Heaters

2 Answers

How do I change language setting on Vaillant VRT 392f boiler remote control


here mate try this it worked for me.

Press left key

Scroll till page 15

Code will say 000 - should be 1000

Press right key once change first digit to 1

Press right key again

Will be on C1 in top right hand corner

Scroll through C pages till A1

Two A1 pages looking for one that says de..utch

Click right key once and change to d.. English

Aug 04, 2012 | Water Heaters

1 Answer

Water temp stays at 160 degrees


Specific type of water heater does not show on web search.
I am guessing you have tank-type electric water heater.
Did you replace both thermostats and test elements?
Element could be cracked, thermostats can stick open, upper thermostat wired incorrectly, wire shorted.
We know that electric power to water heater is good, and circuit breaker is good.
Why is eco is not tripping? Why is TP valve is not leaking?
Copy following links for step-by-step:
http://waterheatertimer.org/How-to-replace-thermostat-on-electric-water-heater.html
http://waterheatertimer.org/How-to-test-water-heater-element.html
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html

Jul 21, 2012 | Rheem Water Heaters

1 Answer

Lower thetermostatv temprature to 66. it's set to 77 right now and doesn't go lower


Question is not clear.
Add a comment and say what you want to do.

You have 240Volt electric water heater.
Lower thermostat is set as low as it can go at 77.
But you want water temperature set to 66?
First thing to remember is that water heater thermostat settings are approximate since they read temperatures through the steel tank wall.
Second thing is that thermostats for electric water heater are generic, and are not made for lower temperature range settings. This is probably since most people complain that water is not hot enough.
I'm looking at a generic lower thermostat from Lowes right now. The low temperature setting is 90 degrees F.
Looking at some older thermostats from a drawer right now: one does not have a lower temperature mark, the other is a Reliance with low temp of 95, the old craftmaster goes down to 80.
So I don't even have a thermostat that goes as low as the one you have, except for gas water heater thermostats that traditionally can be set to 50 degrees for vacation mode to prevent freezing.
More thermostats can be seen on following link:
http://waterheatertimer.org/How-to-adjust-temperature-on-water-heater.html

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Need to up water temp in a 50 gal rheem 82v52 electric no dial obvious


The two blue rectangular cover plates, held on by two scews, cand be removed by taking out screws. There might be a little piece of insulation present when you pull off the panel, pull that out. You will see a pointer that is shaped kind of like an egg, pointing at numbers which represent temp in degrees. Start with the lower dial, this is your thermostat, Raise temp setting by 10 deg. Hypothetically, depending on what your present setting is, try setting lower thermostat at 130 and upper at 120. Your lower thermostat should be higher than the upper because of heat rising, it is more effecient and both thermostats don't have to be at the same temp. This will save you money in the long run.

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1 Answer

Worcester DT 20 RF Room Stat, when batteries were replaced in correct positions the unit still did not show any signs of life


It is recommended that you use all new batteries when replacing them in the Worcester DT 20 RF Room thermostat. Rest the power on the heater with the thermostat near by, this will reestablish wireless communications between the two. You will need to reprogram the heaters timer as well.

Dec 11, 2010 | Bosch Water Heaters

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Vaillant 831 combi boiler timer help


check to see the time clock is set with the clock symbol. there are three settings on analog clocks I , O and clock the I setting is constant running, the O setting is off and the clock setting is timer.
also try setting the thermostat up higher to see if the boiler fires.

Mar 25, 2009 | Water Heaters

1 Answer

Alpha boiler - wireless programmer failing


it sounds like the problem may be in the boiler and not the controller itself. Do you kno which is are the two wores that are the r-w for the thermostat take and purt them together and see if the boiler stays on or shuts off like it does with the thermostat. If it does then replace the reciever. If it doesn't then you have another problem. Good Luck

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