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WHY do you think the manifold pressure isn't correct?

It's rare that is a problem.

Edited my mod

I know you're kidding, but let's go easy on the violent speak please.

Thanks

Personally I favor using a wire brush.


As an alternative, use a $50 bill. Of course it's "used" then and you need to charge for that as supplies.

Going back to the original post. I'd say the problem originated with the sloppy initial diagnosis. With intermittent problems, too many poor repairmen like to run the furnace and then get out ASAP...

The approach I'd use would be to remove one burner and install a plug in place of the burner orifice so it is completely disconnected. That would require some other adjustments, such as moving the...

Well, you don't have what is commonly called an igniter (hot surface igniter). You have an intermittent pilot ignition system where the pilot isn't staying lit.

That MIGHT be a bad ignition...

Heh, heh! I just started in on page 1 and figured I would surely be able to read the dramatic conclusion by page 6!

What a disappointment!

What are the odds that the poor guy calls three different companies and gets Larry, Moe and Curly out to inspect the furnace?

I'd start by reading the gas meter and checking to see if the meter was over read.

The furnace manual is at

http://www.docs.hvacpartners.com/idc/groups/public/documents/techlit/58p,r-13sm.pdf

I agree this is likely to be a venting related problem.


My suggestion is that you need a way to analyze what's going on with the venting system, and the way to do that is to install a monometer...

I got an Advanced Class amateur Radio license forty years ago, and that gives me an understanding of electricity and electronic circuitry much beyond that of most HVAC techs.

Of course, that...

The gas utility that trained me used a variety of methods.

1. Some training on circuit diagrams and how to interpret them.

2. Wiring boards where students connected up components to create...

You really need the adapter to test the system properly.

Without the adapter, you'll typically get 20+ millivolts, and that might drop to zero under the load of a magnet.


Also, with the...

A person who has been working installing and repairing furnaces for 3-5 years might be worth considering. Someone still in school, no.

Just not the depth of experience or judgment that is needed...

I agree that a flame rollout switch is unlikely to be the cause of the problem. If it's opening, it's probably opening for a reason.

Get the whistle fixed.


Check your zoning regulations. They may require more clearance to a neighboring property than you have.

In general, under contract law a contractor is entitled to a reasonable opportunity to complete repairs under a guarantee. If they can't do that, you can hire someone who can and charge the...

Diogenes went around with a lamp, looking for one honest man.

You need a contractor who is both honest and competent. TWICE the problem Diogenes had.


Good luck.

A CAV furnace isn't as picky about gas input as sealed combustion systems.

It's probably no especially critical, but I'd change it out to the orifice size specified by the manufacturer. You may...

The gas utility I used to work for sold pulse furnaces. They had a lot of trouble making them work reliably, and after years of sending repair people out to doctor them up, they offered people a...

Oh, so it's FREEEEEEEEEEEEEEEEEEEEEEEEEE is it?



In a pig's eye.

I'd be suspicious of a dirty pilot burner or pilot orifice. It doesn't sound like you've taken a careful look at the pilot flame or know what it should look like.

And a dirty pilot orifice is the...

One that doesn't work.

Another possibility would be installing a unit heater hanging from the ceiling in the club room. A little noisy but it would bypass the corrosive environment of the pump room and even free up a...

A furnace used for heating purposes has the fan motor in the air stream, so all the heat produced by the motor is distributed into the living area.

So, regardless of motor efficiency, the...

My, but there is a lot of blinking and flashing on this website recently!

I have programs to block that, and various web browser features shut off to avoid it, but I guess the website managers...

I see there is a current thread about a pellet stove that wont feed pellets and a second thread about pellet stoves that wont stop feeding pellets.



People are never happy.

So I got a call from a friend of mine saying he was having no success repairing his gas fireplace, and could I help.


Well, by and large I've been successfully ducking furnace and fireplace...

He should have checked for gas with a gas detector, which will detect odors from the burners and such that might be leaking past the gas valve or some other place. That's a much better way to check...

I don't blame him. I'd be nervous too.

They'll be baaaaack!


You might consider leaving the pilot burner lit through the summer, and turning the fireplace on for a few minutes each week to give those little beggars who are moving in...

I presume that what you are describing is the flame burning inside the burner in front of the orifice rather than on top of the burner.


This is called flashback and is caused when the velocity...

I like the picture. I bet that is a GOOD dog!

Flame color and effects can vary widely among gas fireplaces.

Check the owner's manual which often describes how the fire should be built and what the flame appearance should be.

Intermittent problems CAN be a problem to diagnose.

But often they are merely a challenge to diagnose, and should be correctly identified and corrected the first time out with good diagnostic...

Is this a Carrier, Payne, Bryant or Day and Night Furnace?

If so, what is the make and model.

Many of their furnaces turn the fan on when a problem of various kinds is identified.

It's the first time I've been back to this site in months. I have a replacement computer.


Despite my efforts to get the blinking, flashing and moving advertising to stop by turning of portions...

So this is 4" bare steel pipe?


As a gas utility Fitter, we would likely have inspected for any leaks on such a system at the operating pressure and left it as is if none were found.

We...

I used to be a field collector for a gas utility.

When you have a wrench on the gas valve in the winter, their hearts and minds will follow.

I've come back days or weeks later and told the occupants I needed to check on the operation of the furnace.

Removed my part and left.

Why measure the pressure when you can replace the pressure switch, guess and hope you have solved the problem?

I would'a thought you'd have figured out the explanation for this.

In the morning all the heating contractors and sales reps get together for coffee in town. They all compare who is asking for...

This new NSPS from the EPA coupled with the ICC trying to outlaw standing pilots threaten to kill the entire hearth industry. If they get their way, these eco-nazis will put tens of thousands out of...

What parts?

The manual seems to give unusually good directions for troubleshooting equipment. You seem to have made only a few of the suggested tests.

I'd start by going back and following all the...

Have there been casualties among fireplace manufacturers during the current recession?

Who has closed their doors, who might be shaky and who looks to be a survivor?


Any new companies, and...

I don't see why a gas "fireplace" couldn't be attractive with a small gas input.

But it wouild probably need to be designed for such an input, and perhaps not designed to look like a smoldering...

Reading through nthis thread:


Another consumer trodden down under the hooves of the thundering herd....

The fire department comes out in a big hurry and for free. Then they call the gas company, which comes out pretty quickly and for free.