Well, Canvasback is NOT HAPPY!!!

Got up this Morning and went down in the Basement to turn the Breaker on for the Boiler. It was set at 65 last night, but the Temp read 75. Shouldn't fire up, but it did.. Constantly! Then I turned it off at the Thermostat. same thing. So, I shut it off in the Basement . Tonight after Supper, It was set to 70, but read 74. Bedrooms have water in the Radiators , but no heat. Same for the Bathroom. Living room and Office are the only radiators that have heat. Bled all the Radiators again tonight. Just water, no air in lines.


What the heck is causing this ? They have been out 5 times to repair a NEW BOILER!! NOT HAPPY !!

Are the radiators on a zoned manifold?

I don't understand. You say it is set for 70 bit reeds 74 . That means your t stat is satisfied and should not be calling .

Is the thermostat wired to the boiler or the pump? Most boilers maintain temp (or pressure if they’re steam) and the zone valves r pump is controled by the thermostat.

also is there an outdoor air reset. That uses an algorithm in the CPU to give you x amount of water temperature per x amount of degrees outside. it could also be locked out on outdoor air temperature because it is too warm

Bedrooms and bathroom all cold since last night. Thermostat is a programmable Honeywell thermostat on the wall. As to how it is wired, it is the same as the old Boiler. No outside air temp reader. When I turned the wall thermostat to the on position a few minutes ago, I went in the Living Room to check the Radiators. Even though I had the wall thermostat turned off all last night , the radiators in the Living Room were toasty warm. They should have been cold. Somehow, even with the wall Thermostat turned off, that Boiler is fireing up and heating the office and living room ; but not the bedrooms or the bathroom.

Might be the bladder tank full of gunk.

If the office and living room radiators are on the same zone, then their zone valve is probably stuck open, at least partially. Hot water continues to bleed through that zone, even though the thermostat told that valve to stay closed.

-NC

The little round pressure tank on the Boiler, or the Pressure tank for my water well?

It was set for 70, but read 74 . I had the wall Thermostat turned to the off position, but the boiler was still firing up. New batteries in the Thermostat.

are your wires for each thermostat crossed at the zone valves . try turning on the other thermostat and see if it brings on the opposite of Zone

If a normally closed valve is left open(happens at time of service) the a system will gravity heat(hot water rises rises and cool water sinks) giving warm heat when not called for by the thermostat. If a normally open valve is closed then you could get no heat when there is a call for it by the thermostat. happens a lot on service calls.

Canvasback, what were they there for the other 5 times and what did they tell you they do to the system? There are a few possibilities as to what is wrong as mentioned by the guys already. Let us know what you fins out.

Ok, this Boiler is playing games with me ! I cranked the wall Thermostat up to 72 Degrees. 30 Minutes later, The old American Radiator Cast Iron 1920 something Radiators are all good and HOT! Even the Bedrooms and the Bathroom Radiator! GOT Heat now !

Greenetrapper: Only one wall Thermostat in the House for the Boiler.

Is it an old t87f with a Mercury bulb? if it is the heat anticipator it needs to be set or changed out to a digital thermostat

Replaced a Tayco Circulator Pump 3 pumps burned out . Each lasting no more than 1 Month.

2 times the repairman came out because boiler would only fire up for 5 minutes , reach 196 and then shut down. Each time, they drained the system and did some adjusting of the Boiler.

The old red Flo Control valve , which is original to the house, that was giving the new boiler fits. Repairman left it in a permanent open position, so it would not burn out the Circulator pump again.

2nd last time repairman was here, he replaced that cracked copper pipe , drained and flushed out the whole hot water system twice. Boiler, radiators and all the pipes. Must have drained and pumped back in at least 500 gallons of water. Repairman wanted to flush as much stuff out of the old Cast Iron Pipes and Radiators , as he could. He also replaced some pressure part that maintains the water pressure in tank.


Last time repairman was here, They adjusted the electronic controller, lowered and straightened the Vent Pipe. Also cleaned up the bad solder job. There was a lot of solder that ran down the pipe that replaced the cracked pipe.

Brand new Honeywell 7 Day electronic Thermostat on the wall.

If you lived a bit closer I would stop over . I would have you straightened out in no time .

there's a parameter in those thermostats called installer setup. You can set a differential in a thermostats to allow your thermostat to have X amount of degrees before it will turn on plus or minus. a lot of times it is 3 that can be tightened up a bit

I had problems with that thermostat.Changed it out to a regular stat and fixed my heating cooling problems.