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Combi boiler ferroli optimax 25c

How does the overheat safety thermostat work , is it normally closed and open when too hot, or normally open then closed when overheated

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6ya6ya
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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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rockitman187
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SOURCE: ferroli optimax 31c

Here is a link to the manual.It shows fault codes.
http://www.ferroli.co.uk/Product_Documentation/Domestic/Optimax_HE_31_C_Manual.pdf

Please rate this solution.

Posted on Jan 17, 2009

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SOURCE: 98 328IS OVERHEATING AFTER CHANGING THERMOSTAT

Are you putting the thermostat in correctly? It it will not work backwards.

And to confirm that there isn't a different problem, take the thermostat out all together and see if it overheats.

Engine not fully warming up is not usually caused by the thermostat. Stats usually fail closed, not open.

You will want to check the water temperature sending unit or gauge after verify the water temperature with an external calibrated thermometer. You can attach and insulate the external thermometer to the housing where thermostat is located.


Reply back what you figure out. I will be happy to help you further.

Posted on Feb 03, 2009

  • 1 Answer

SOURCE: ford ranger truck overheating

I have had this happen with my ranger. Changed everything I could to try to fix the over heating. It turned out that I had a small leak in my head gasket and it was allowing exsaust gas to go into the cooling system witch was over pressurizing it. Also the air from the exsaust will heat up much faster than liquid making your thermostat to read hot and will not be able to blow hot air in the cab because there is no liquid going to the heater core. This happened to me when my blet came off and I tryed to make it home. If you had it over heat for a long peirod of time it may have ripped the head gasket.

Posted on Feb 21, 2009

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SOURCE: 1997 Chrysler LHS is overheating

If when you replaced coolant you noticed taht it fills slowly, the radiator could be internally blocked. Usually it can be flushed or if really bad, replace it. Also have the radiator checked for hydrocarbons...any in there tells you that there is a head gasket problem.

Posted on Jun 26, 2009

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How to know if thermsat need change on Honda accord v6


1. If your coolant temperature is high your engine will overheat and you may have a faulty thermostat . However overheating may also be caused by other issues such as a failed water pump, blockages in the cooling system, a compression leak into the cooling system and other issues.

2. When the engine is fully cold open the hood and locate the top radiator hose running between the top of the radiator and the engine. Start the car and then feel the top hose. It should stay cool for a short time while the coolant gets to operating temperature and then the thermostat will open. When it opens the hot coolant from the engine will flow through the top hose into the radiator and you should feel the hose warm up very fast. This is an indication that the thermostat is operating normally but it is still possible that it is stuck partly open (when it should be fully open) and is impeding the flow of hot coolant from the engine. In that event it would need to be changed.

If you start the engine and you almost immediately feel hot coolant running through the top radiator hose the thermostat may not be closing at all and may be stuck fully open or partly open. It would then need to be changed. If stuck fully open the engine will run too cold some of the time and inefficiently, especially if the outside air temperature is very cold. But if a thermo is stuck fully closed or partially closed this will cause the engine to overheat and engine damage will result.

To properly test a thermostat it really needs to be removed from the engine. Please read the section in the link on Thermostats.

What to Do When Your Engine Overheats



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Mar 26, 2016 | Honda Cars & Trucks

1 Answer

What can cause my car to overheat only when my radiator cap is on


Car Overheating? Why your Car Overheats & How to Fix It

www.vikingspeedshop.com/car-overheating-fix-prevent-future/

Rating: 4.2 - ‎51 votes
Oct 30, 2015 - The biggest cause of this is a faulty thermostat that is stuck closed. ... If the radiator cap were to be at fault you most likely would see steam from boiling coolant. My car only overheats when I accelerate hard or drive hard!

Why Is My Car Overheating and What to Do? - EnkiVillage

www.enkivillage.com/why-is-my-car-overheating.html
An overheating car can be caused by many problems. ... Why Is My Car Overheating: Possible Causes .... If you do open the hood, try to do so only when the car is cooled down. ... Never open the radiator cap while the radiator is hot, as the release of pressure could lead to serious ... I wonder if my radiator might be clogged.

Common Causes of Overheating ' ASC Industries, Inc.

asc-ind.com/cooling-system.../common-causes-of-overheating/
... injury, never, ever attempt to remove a radiator cap while the engine is hot! Anoverheated engine can be caused by anything that decreases the cooling system's ...Possible leak points include hoses, the radiator, water pump, thermostat housing, ... Be sure to use the coolant recommended by your vehicle's manufacturer.

Diagnose Engine Overheating - Auto Repair Help

www.auto-repair-help.com/auto.../diagnose_engine_overheating.php

Feb 09, 2016 | Cars & Trucks

2 Answers

Why is my car overheating?


You might have a clogged radiator. If so replace the radiator. I would first replace the thermostat as it might be bad. When they go bad they usually stay stuck in the closed position. When closed there is no flow of water to or from the radiator. You can check the thermostat by removing it, it is located on your upper radiator hose, the return hose. To check it boil a pan of water and and using a pair of pliers hold the thermostat in the hot water. If the thermostat is bad it will not open. Hope this helps.

Aug 08, 2012 | 2006 BMW 3 Series

1 Answer

I have a 1989 s10 blazer 4.3.The temp guage reads 225 is this normal? I have replaced the waterpump,thermostat & belt.


For car running hot and overheating issues, I suggest to you go through this help links. Click this link below and go through the troubleshooting procedure to take care of the problems: ----Car runs hot? http://howtobyme.blogspot.com/2011/11/car-runs-hot-in-traffic.html
-----------All types of car overheating problems and troubleshooting?

http://technoanswers.blogspot.com/2011/11/all-types-of-car-overheating-problems.html
Car freeze overnight and started overheating while driving?http://technoanswers.blogspot.com/2012/01/car-freeze-overnight-and-started.html-----------Engine Overheats and heater blowing cold?

http://howtobyme.blogspot.com/2011/11/engine-overheats-and-heater-blowing.html

---------------------------
Car overheats and Air blows hot at idle?
http://howtobyme.blogspot.com/2011/11/car-overheats-and-air-blows-hot-at-idle.html
--------overheating? http://schematicsdiagram.blogspot.com/2011/12/buick-century-overheating.html
----------Car engine Overheats and transmission starts slipping?http://schematicsdiagram.blogspot.com/2011/12/car-engine-overheats-and-transmission.html
----------This details will help.Thanks.

Feb 20, 2012 | 1989 Chevrolet S-10 Blazer

1 Answer

My 97 gran prix overheated and shut itself. And now won't start. The Atifrz leaked out and engine overheated.


sometimes when an engine gets hot enough it will stop running due to the metal expansion when it is hot.if it cools off it will probably start but don`t run it very long especially without coolant.the thermostat may have seized in the closed position this sometimes happens as when the car is running the temperature flucuates the stat will close and open all the time(won`t close completely).another problem could be a bad head gasket that allowed coolant into the combustion chamber enough that the motor went into what is called hydraulic lock,coolant has filled the combustion chamber enough that the piston won`t move through out its normal travel.i would try changing the thermostat first refill cooling system and let run until the cooling fans have cycled on and off.if it doesn`t overheat and it cranks over when you try to start it then the stat is more than likely the problem.

Apr 08, 2011 | 1997 Pontiac Grand Prix

1 Answer

Hello... I got problem with my honda odyssey. For the past 3 days, if i start the engine, after 5 min the temperature will goes up to HOT and engine indicator light-up. I turn-off the engine and then start...


Your English is very good.

From what you have described, which is a rapid over heating of the radiator coolant fluid and therefore a hot engine condition, it would appear that the thermostat in the engine's cooling system is faulty.

If the thermostat is sticking in the closed or nearly closed position temporarily, there will be no flow or very little coolant flow between the engine and the radiator and the engine will overheat.

You have advised that after the engine is shut off , and radiator coolant fluid has cooled, you re-start the engine and drive the car without the overheating condition occurring again and the radiator coolant temperature is normal. This time there is no overheating because the thermostat is working normally.

You should have the thermostat replaced as soon as possible because allowing the engine to overheat can cause very expensive engine damage.

If you had a continuing overheating condition then I would suspect both the thermostat and the water pump. However as the overheating seems to be only temporary, and clears itself after you have shut down the engine and re-started it 10 minutes later (without further overheating arising) then I think you only have a faulty thermostat.

Please also check that the electric fans which draw air through the radiator are operating. These run on a temperature sensor and will switch on automatically once the radiator coolant fluid reaches a certain temperature and then switch off again when the fluid temperature reduces. You will hear them running once they start up. If these fans are not working the radiator coolant can quickly overheat in various driving and temperature conditions because there will be insufficient air flow through the radiator to cool the fluid. If the temperature sensor is faulty or has died, or if the electric motors running the fans are faulty, the fans will not operate.

I hope this helps.

Dec 18, 2010 | Honda Odyssey Cars & Trucks

1 Answer

Overheating at idle


The simplest thing that it could be is the thermostat is stuck closed. Which doesn't allow coolant to flow through the engine. Have your coolant system checked out...possible drain, flush and fill. Have the thermostat changed out. Have the heater core and all hoses checked out. Normally when a thermostat is stuck closed...all you get is heat. And when it is stuck open, you get no heat. Unusual that you are not getting heat from a motor that is overheating.

Apr 28, 2010 | 2005 Pontiac Grand Prix

1 Answer

2005 dodge caravan need to know symptoms for faulty thermostat


There are two primary symptoms of a faulty thermostat (assuming you mean the coolant thermostat in the engine not the A/C Heater Thermostat).  The thermostat can fail in basically two ways:
1)  Stuck open - Engine runs colder, heater takes forever to heat up. 2)  Stuck closed - Engine runs very hot, then will suddenly drop in temperature, then run very hot again.  Or engine overheats constantly.  When the engine is hot, feel the upper radiator hose.  If it is not hot, you can bet the thermostat is stuck closed.  If it is hot, the thermostat may not be stuck close, but not opening at the proper temperature.
Stuck open is annoying, but not dangerous.  Stuck close is dangerous and can cause overheating-related damage to your engine.
If you are handy, you can replace it yourself.  Otherwise it is an easy job for a mechanic.

Jan 24, 2009 | 2005 Dodge Caravan

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