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Peerless Boilers, How to troubleshoot an old gas fired Peerless furnace or boiler.

Peerless boilers.

I Have Installed many boilers and one of my favorites Is the peerless boiler both gas fired and oil fired.

On this page I show some repairs I have made on an older Peerless gas fired boiler.

I've found in many cases, no matter how much information I put in the pages of this website, people still have unique problems that are not covered, this is because all problems are unique and need specific instructions, this and the fact that most home owners are not master plumbers (like myself) make it difficult for a home owner to be sure what the problem is and how to fix it.

I will help you figure out what your problem is and give you step by step instructions on how to fix your problem in real time.

If you want to fix your Peerless boiler or furnace right now, use the 24/7 Help Line

Have your boiler and furnace inspected online by a real master plumber with many years of experience.

Peerless boiler

Click on the picture for a larger view.

 The old peerless gas fired boiler notice the black carbon around the gauge.
This is common with this type of boiler make sure you have a carbon monoxide detector in the house. 

Why do I not Have heat?

I'm just going to list some of the things that could be the problem.

Every problem is unique and there is never a one reason answer for not having heat.

First the thermostat, Although they do fail, most of the time it is not the thermostat.

Many people think it's the thermostat and replace it, I look at the Thermostat last.

The First thing I do Is, see what the temperature of the boiler is.

If it is hot between 160 and 190 % f.

I know the boiler is working.

If it is cold, I check to see if it is set up as a hot boiler (one that is always hot) or a cold boiler (only gets hot if there is a call for heat)

If it is set up as a hot boiler but is cold, I check pilot light.

If pilot is lit I check to see if there is power. coming to boiler If no power I check breaker.

Okay so we have power and pilot is lit the boiler is set up to be hot, but boiler is cold why?

Most boilers have 24v gas valves, some have 120v but most have 24v this power is supplies by a transformer, the power goes through the transformer through the aquastat then through all the safety switches, rollout switches and spill switches any one of these can be tripped and or burned out.

Not all boilers have these safety devices the older one we worked on above does not have any.

Replace Aquastat Relay.

Click On any picture to see a larger picture.

Replacing an Aquastat relay to a simple Aquastat.

First the reason I am replacing the aquastat relay with just a simple aquastat and not using a relay on this boiler (this may not apply to your needs)

This Boiler has a garage unit heater that is set up to have hot water run through it all the time, so the pump is running all the time and the boiler is hot all the time.

So there is no need for a relay to turn the pump on.

If it needed a relay I would replace it with simple aquastat and a fan center relay.

Note If you did not understand the previous paragraph, you should stop and call a heating professional.

Peerless Gas Boiler

The next time I have to do that I will add that scenario to this page. If you need instructions for that now go to this page 24/7 Help Line.
Does This Look Like your boiler? 

All the controls are behind the front cover. So remove the cover Turn the switch to the boiler off.

Warning the switch may not turn all the power off. turn off breaker too and test line to make sure power is off.

Peerless gas furnace

This is the old defective Aquastat relay.

The relay sticks and causes the boiler not to run.
To get this off you have to loosen the screw/nut on the top see the next picture.

I had to pull the top or the boiler Jacket over to get to the screw.

Old peerless boiler

Once the screw is loosened push the screw down to remove the Aquastat from the well. when loose enough it will pull straight out.

Old Peerless furnace

Now that it is out you have to remove all the wires. This is where I get nervous about giving further  instructions, because if you misunderstand, you can burn your house down and possible be killed.
So the only way I will give Instructions with regards to wiring an aquastat and gas valve is through my 24/7 Help Line.

This is the well If the Aquastat relay you are replacing is a White Rogers you may have to replace the well because the old wells are to small for the new probes on the new aquastat this one was a Honeywell so I did not have to replace the well.

This is a picture of the new aquastat the copper looking thing coming out of the back is the probe It has to go all the way into the well. this one is secured with two screws from inside the aquastat.

Taco 007 Circulator Pump

The instructions for replacing the 007 pump has been moved, please follow the above link.