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15 year old Slant fin boiler, Victory propane gas fires then runs for about 30 seconds to a minute then shuts down only to start all over again, does this continously last few weeks. Help. What could be the cause?

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  • todd51 Oct 25, 2008

    I need to be able to fix this as i live far from a boiler expert. I put a new intermitant module on but never changed a thing still fires then shuts down then fires again within seconds and does this regularly Someone must have some idea without telling me to get an engineer. Thats obious if I lived in a center.

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Your symptoms suggests that you need to do following

  • Check the master switch and circuit breaker or fuse.
  • There's a possibility that the electrical system may have overloaded.
  • If there is no circuit breaker trip or a blown fuse, the problem may be with a faulty thermostat.
  • Also check the thermocouple to see if it is positioned properly .

Posted on Oct 25, 2008

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The problem in a main board.get it checked as its very old.a problem can be detected properly by the engineer at your place.
thanks.

Posted on Oct 25, 2008

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1 Answer

I have a Rudd furnace and air conditioner. The air conditioner is not working. The external air conditioning unit will start and run for 15-30 seconds and then shut-off. It tries to do this about every...


Hi, and no they are not related, but act like they are. If the outdoor unit starts, fan and all, we call this short cycling on its pressure switch. You have 2 pressure switch's, one for low pressure as its low on freon, or high pressure where its overheating and shutting off on its head pressure switch. Unplug it at the box near the unit. Take a garden hose and wash your coil out real good, but not to flatten the aluminum fins on the coil. You can also use a solution of detergent and water to spray the coil down before washing if you can, but you don't have to to find out if it is the high pressure switch. If it continues to short cycle, then you have developed a small leak and lost enough freon to cause this problem. You will need to have it charged and leak checked if they determine how large of a leak it is. I am pretty sure from the amount of time it starts and stops, its low on gas. When the unit starts, the compressor will start to pump causing it to go into a vac on the low side gauge. When running on a full charge, it will be on about 64 p.s.i. at 95 degrees outdoors. If is low on gas/freon, it will pull down to around 20 p.s.i. which is the factory set point for the low pressure switch to kick off. The gauge will then start to rise and in seconds start up and repeat this again. This is what yours is doing now. Try washing the coil first, and turn it on. If it continues to short cycle, you will have to get it charged. If its 10 or more years old, it will take the R-22 freon. If newer, it may be the 410-A. Either way you cant buy it. I hope I have been of help to you. Please let me know.
Sincerely,
Shastalaker7, a/c Contractor

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2 Answers

The boiler wont fire up and the blue light flashes once per second


Let's see what we can do to trouble-shoot this boiler--

First of all-- Are we talking about a Hot Water 'Boiler'-- In other words does this boiler heat water that circulates thru the house, to keep you warm?

Next-- What is your fuel?

Have you Shut the system down, to reset it?-- What happens when it comes back on again?-- Clicking sounds-- pumps trying to start-- solenoids trying to open, etc.-- Tell us what you observe-- so we can help you trouble shoot this problem.

Mack B

Jan 15, 2011 | Air Conditioners

1 Answer

No hot rads down stairs boiler comes on 3 miniutes then of again


Hello
By your post im guessing you have a 2 story house.
Have a look at the boiler,water pressure guage.Should be between 12 and 15 psi 140 to180.f when running.
If its above or close to 30 psi the relief valve will open to let off the pressure,we do not want this to happen normally.

If you have high water pressure at the boiler you will need to go to the highest radiator or any one on the second floor and open the bleeder.Looks like this

http://www.ourfixerupper.com/wp-content/uploads/2007/11/cast-iron-radiator-02.jpg

Carefully open it slow into a bucket,let air out until you get a steady stream of water.Do this to all of the radiators,idealy using a bleeder key or needle nose pliers.This may take some time.

Once we can assume all the air is out,check your water pressure again should be 15 to 20 psi.If you have no pressure then your auto fill valve is bad.If you have 15 to 20 then proceed.
Raise the temp of the t stat to start the boiler.6 degrees above whatever the room temp is.
If you still are having problems your t stat may be faulty.If your boiler is at 15 to 20 psi 140 to 180.f and it still shuts down after 3 min your return pump may be bad.

Hope this is helpfull

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1 Answer

It does not fire at all times igniter works, I can hear the gas valve when opens, some times it fires for a minute and some times does not fire at all


Problem: Your furnace will not ignite the gas to produce heat for your home. When a furnace has a bad ignitor what I see most of the time is the following sequence of operation:


1. Thermostat calls for heat. 2. Draft inducer motor starts. 3. Pressure switch attached by a small plastic or rubber tube senses the negative pressure produced by the draft inducer and closes. 4. Draft inducer runs for 30 seconds to a minute before you hear a gas hissing sound. The ignitor did not glow, the flame sensor (a small metal probe about 1/8" in diameter, with a white porcelain base) does not sense the flame, so after 8 to 10 seconds the hissing sounds stops with no ignition of gas to heat your home. Your furnace shuts down and goes into a lock out condition until you turn your power switch back off and on again. Then the sequence starts all over again with no ignition of the gas. Solution:You probably need to purchase and install a new ignitor. I would suggest that you inspect your ignitor closely for cracks. Make sure you do not touch the ignitor with your bare hands. If you do not visually see a crack, then you could have a furnace control board problem or a limit, rollout switch problem. The furnace's control board might not be supplying the voltage to the ignitor. If your furnace lights and the gas stays on for 8 to 10 seconds, then shuts right back off, then you need to clean your flame sensor with light sand paper or steel wool. You might need a new flame sensor, but most of the time they can be cleaned an will work well after cleaning.

Dec 07, 2010 | Air Conditioners

1 Answer

Hello, I have a Amana Air Command 80 model #GHI90A50, 22 years old. This furnace is on its third ingnition module (last one two yeras ago). The symptom I am trying to diagnose has been ongioing since this...


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Dec 05, 2010 | Air Conditioners

1 Answer

Furnace runs OK, but blower runs again a few seconds later


Could be a defective thermostat in the plenum.
When a gas furnace shuts down the fan(blower) will run until the plenum cools to the safe range. Usually 1 and 1/2 minutes.
Intermittent operation is a defective thermostat or relay.

Mar 11, 2009 | Carrier Air Conditioners

1 Answer

Gas and flame for 3 to 4 minutes then shut down


try cleaning of the flame sensor infront of the flame comes out. carefull its fragile

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1 Answer

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