Hot water issue - furnace ?

MAXUM · 03-19-2017, 10:28 AM

Quote:

Originally Posted by bigdog

Thanks to all who have responded to my thread here !

I was also planning to have my furnace/oil dealer check out the issue.

Rest of house water from faucets coming out hot. but the washing machine
water start hot then goes to lukewarm within a minute or two.

That said, I still think the issues is related to the furnace, not being able to keep up with the demand.

Had the same problem. Mine turned out to be the burner controller, it was waiting far to long to kick the burner on. Initially I attempted to screw with the temp adjustments but it didn't do a damn bit of good. In fact right before I replaced it - the burner would fail to start so I'd have to manually reset the burner. Replaced the controller and all was good. Before I did that however I did check to ensure the temp controller was operating correctly. Simple to do with a multi-meter.

My furnace has a Beckett burner. New controller was about $70.00 at FB Webb. In fact before I bought it I talked to the guys down there just to make sure I wasn't missing anything. They have some good knowledgeable folks working there. As it turns out the controller I had (brought in the part number with me) was known to be problematic and the new controller I got was updated one that supposedly addresses several problems. So far so good, in fact I've noticed that the false starts I had been getting pretty much since day one are no longer occurring. That should have been a clue there was a problem but at the time I figured since it was intermittent that it was normal behavior.

bigdog · 03-19-2017, 01:07 PM

Thanks MAXUM for the tip about 'burner control' !

When I have furnace tech review, I will mention the burner control as the possible issue... TBD

SIKSUKR · 03-22-2017, 01:43 PM

You say you have hot water at other points but the washer soon gets cooler. Before I assume its the coil run the other water points that seem fine for a while and see if they cool down. If so then I would suspect your coil could have caked up minerals that keep it from exchanging the heat from the boiler water to the hot water feed. I've replaced mine and it was very simple. In my case the boiler water pressure kept getting too high and the relief valve would open. Turns out I had a leak in that coil that would allow the higher water pressure to enter the lower pressure boiler water chamber. Easy fix though.

03-19-2017, 01:07 PM	#2
bigdog Senior Member Join Date: Apr 2006 Location: Central MA-Gilford Posts: 1,453 Thanks: 347 Thanked 124 Times in 98 Posts	Burner Control Thanks MAXUM for the tip about 'burner control' ! When I have furnace tech review, I will mention the burner control as the possible issue... TBD

03-22-2017, 01:43 PM	#3
SIKSUKR Senior Member Join Date: Apr 2004 Posts: 5,075 Thanks: 215 Thanked 903 Times in 509 Posts	You say you have hot water at other points but the washer soon gets cooler. Before I assume its the coil run the other water points that seem fine for a while and see if they cool down. If so then I would suspect your coil could have caked up minerals that keep it from exchanging the heat from the boiler water to the hot water feed. I've replaced mine and it was very simple. In my case the boiler water pressure kept getting too high and the relief valve would open. Turns out I had a leak in that coil that would allow the higher water pressure to enter the lower pressure boiler water chamber. Easy fix though. __________________ SIKSUKR

The Following 3 Users Say Thank You to MAXUM For This Useful Post:
bigdog (03-19-2017), KennyFromBoston (03-22-2017), Marauder (03-19-2017)