Turned off boiler to replace Circulator for the hot water. Turned furnace back on. Did not ignite. Tried to hit the reset button for 30 seconds and nothing happened. Furnace will not ignite. No noises of attempting and no light.

It sounds like it has been mis-wired. The circulator pump should run all the time the boiler is on and should continue to run when heat is called for so it circulates the water in the radiators as it cools. There is normally an electronic valve that shuts flow to the radiators when only hot water is needed. Call for heat and that valve opens. It sounds like you need a mature, old school boiler / central heating technician who has lots of real world experience with older boilers.
https://www.youtube.com/@MiHeatingGuy

If you have a large screwdriver, you can use it against the pump as a stethoscope to listen for the pump running. The noise is very distinctive.

Maintaining water pressure and keeping the circulator pump running, go to the furthest bleeder and remove any air at each bleed port working your way back to the furnace. You must maintain water pressure or you will have to start all over again.

The squealing sound generally comes from a circulator pump, if it has a drive coupling between motor and impeller housing there is an oil cup/or oil hole, add oil until it is full! If it is a cartridge style circulator you may have to replace it.

Sometimes air in a system will cause this squeal noise as well. Purging the air out of system may be required. If you need to know how to purge a system there is a good pdf file at this link for $8.95 The Basics of Purging Air
From your Forced Hot Water System
&
Troubleshooting A Leaking Boiler
Relief Valve
Miller Furnace Books Repair

The Expansion tank is factory set to 12 psi and the only way to tell if it remains with 12 psi is to drop the system pressure to zero and check the tank with a pressure gauge. If water comes out the air valvestem when you apply the pressure gauge, the tank is bad, replace it! If there is less then 12 psi on the tank add air to 12 psi and open water valves back up to normal operating pressure. Usually the feed valve will automatically stop at the preset setting.If the boiler is leaking water out any relieve valve drains, the feed valve, relief valve and or expansion tank may need to be replaced.

Did you bleed the air out of the pump. The boiler has a flow switch that has to make before it will let the boiler lite. Make sure you have all of the air out of the system and are pumping or flowing water and not air...Also check to see if you didn't happen to of tripped the limit it has a manual reset. Red Button on the front of limit.

Draining is the easy part. Isolate the water feeder (shut off). Open hose bib @ boiler, & open the expansion tank valve to pull air in to allow more water out.
Refilling- let the water feeder fill -should be around 12 Psi, then go around the building to all the baseboards or radiators & open the bleeder key valves to let the air out until you get a steady stream of water. Most of the air should work its way to the expansion tank. Turn the boiler on & test your new pump.

Hi,
In most cases problems with the circulator pump boil down to two problems.
The most common is air in the lines causing an air lock.
The next problem is that the pump gets stuck and is not running even though itmay be hot and seem to be running. In this cause the pump can sometimes betaken apart, cleaned and it will work, but usually it needs to be replaced.

Here is a tip that I wrote that will explain circulator pump problems in moredetail.

Heating Circulating Water Pump Problems

heatman101

There should be a control called an aquastat that regulates the temperature of the boiler. The thermostat will turn on the circulator to start the flow of water through the radiators. If the water coming back from the radiators is very cold, a control will shut off the circulator until the boiler can come up to a predetermined temperature then start the flow of water again. If you have a tankless coil for domestic hot water, you now have a triple aquastat that maintains the temperature for domestic as well as the boiler temp. So yes the boiler thermostat (aquastat) does control the heat of the radiators and domestic hot water. No the pump is regulated by your house thermostat. You should take an amp draw on the boiler and componants to find out what is drawing more electricity than it should and popping your fuse.

From what you are saying it sounds like an issue with either a circulator pump or a zone valve. It depends on what type of system you have ... if you have a circulator pump that only runs the Amtrol then that is probably bad. If you have a zone valve system then it is probably the zone valve if you still have heat for the rest of the house. If you have no space heating then it is probably the circulator pump.

Check all your limit switches on this unit. One of them is either tripped or bad.

Hi Jurgie,
I'm Harvey, the Master Plumber,
Happy to render my assistance.

This is your problem!
When you are switching on the boiler it ignites for 8 to 10 seconds, then it cuts off and the lock out lamp comes on. Pressing the reset button or turning on the hot water tap has the same effect.

I need to get the make and model of your specific boiler to give you an accurate answer!
Waiting for your response.
Harvey, your Master Plumber.