Everybodu giving up already? - http://www.hvacmechanic.com/ Forums
Original message
| Markk
 |  "Everybody giving up already?"
, posted Thu 24 Jul 19:00:  
BTW, as you might expect, when the T-stat is calling for cooling, BOTH the heating and the cooling relays click on.
Sparky
[this message was edited by Markk on Thu 24 Jul 19:02] |
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| Markk
| "Re(1):Everybody giving up already?" , posted Thu 24 Jul 19:28
But the heating relay stays on all the time. That's a problem, isn't it?
Sparky
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| | theduke03
| "Re(2):Everybody giving up already?" , posted Thu 24 Jul 19:58
OK,I looked at your diagram and saw no heat relay. If you are referring to the 2E heating blower relay then yes, it should always be energized. If you notice the relay coil is wired between R and Common, which will always have 24vac. Like I said before, the frost is a concern, the relay is not.
"My dad was the most feared furnace fighter in Northern Indiana."
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| theduke03
| "Re(1):Everybody giving up already?" , posted Thu 24 Jul 19:21
I would not be concerned with the heat relay unless there's a problem with the heat. I think you've gotten off the beaten path, and that's why you're lost. Having said that, I noticed you have a problem with cooling. The frost is unrelated to the heat relay and is more of a real concern. If filter and indoor coil are clean then I would call a pro.
"My dad was the most feared furnace fighter in Northern Indiana."
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| | Markk
| "Re(2):Everybody giving up already?" , posted Sat 26 Jul 13:37
Yeah, I know the frost and the relay are separate issues. I thought the condensate dripping all over might be related to the relay. I didn't want to be sold something if all I need is a charge. Definitely can't afford replacement this year!
The relay:The schematic on the back of the cover indicates there are 2 relays (there is an induction draft relay also) There is a HFR, which stands for "heating blower relay" and a CFR, the "cooling blower relay"
Originally, I just wanted to know why the HFR would be activated when the T-stat was OFF. In other words, this relay is energized all of the time, and that doesn't make sense.
Sparky
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| | Markk
| "Re(3):Everybody giving up already?" , posted Sat 26 Jul 13:45
I might have it figured out...according to the schematic notes, the HFR contacts are normally closed, until 115V is applied to the furnace.
That would explain why the relay clicks on when power to the furnace is clicked on.
Thanks for the help, hope I didn't waste too much of anyone's time.
Sparky
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