Question about Fahrenheat Electric Hydronic Baseboard Heater, 240 Volt

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Our electro-hydronic boiler system stopped sending water to the outer registers. At least, the registers are all cold, except one. It was as if the lines were blocked--the valves that regulate the water were all on the OFF positions. The tank built up enough pressure / heat that it blew over in the overflow pipe, which was scary, but it did its job and kept it from exploding. We don't know what to think. My wife believes that we have a manuel for the heater, and she is retrieving it upstairs.

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Sounds like you have a hot water boiler if it is firing which it must be if it activated the relief valve i would suspect the circulator is not working

Posted on Feb 05, 2009

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My heater gives hot water but does not give warm air .. Please help Thank You in advance! Subodh

I assume this a a boiler connected to a fancoil unit to get the warm air. If so make sure the t-stat is set to heat and that the circulatoe pump is working.

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Oct 23, 2009 | Heating & Cooling

2 Answers


I have some confusion about what you are asking......

There is no such thing as "Hydronic Electric Baseboards"......

I am assuming you are referring to the oil filled baseboard heaters. If so....

The same amount of btu's required to heat a space remain the same whether the elements heat a liquid to warm the air or whether they heat the air directly, the same amount of wattage will be consumed. So, their is no more or less efficiency between the two.

If you are referring to "Hydronic Baseboard Heaters" (these baseboards are fed from a boiler with a pump) Then....I will assume that it is a gas boiler. In which case, the gas boiler would be more cost efficient to operate. If it is an electric the same rule applies as above......the cost is the same.

Oct 04, 2009 | Fahrenheat FBE15002 Baseboard Heater

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Hydronic Boiler relief valve problem?

Check the pressure guage. Typically the pressure in a water boiler should not be more than 20 psi. If you are approaching 30, the relief valve is doing it's job. I would replace or adjust the automatic water feed if the pressure is high. Always replace the boiler relief valve. Tap on the expansion tank, it should sound hollow. Replace it if it is full of water. If you have one of the old expansion tank that has no bladder in it, drain it.

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Need wiring help with Fahrenheat PLF754 240V baseboard heater with Fahrenheat PT2DS double-pole thermostat Open kimono - I know enough about electrical wiring to be dangerous. I have a Fahrenheat PLF754 240V baseboard heater and a Fahrenheat PT2DS (also known as Marley T2) double-pole integrated thermostat that and the heater isn't working. My power supply is a single cable with white, black, and red wires. I traced the supply line back to the circuit panel and found that the red and black wires terminate on a DP-40A breaker. The white wire is grounded. The heater has 2 red wires exiting a center tube at the end of the heater where the thermostat goes and 2 black wires exiting a small cut-out near the top of the same end. There's also a green ground wire from the heater. The thermostat has 2 red wires on the left top and bottom, 2 black wires on the right top and bottom, and a green ground wire. An electrician friend of mine (since left town) installed the wiring, heater, and thermostat for me. It worked fine for about 1 year and then stopped working. I'm trying to troubleshoot the problem but don't have any documentation on how this thing should be wired or how I might isolate the problem to the thermostat, heater, or both. I did verify that the power supply is good. Everything is currently wired as follows: Black power supply to black thermostat (top) Red power supply to black thermostat (bottom) One black heater to red thermostat (top) Other black heater to one red heater Other red heater to red thermostat (bottom) Green heater to green thermostat White power supply not connected - just wire-nutted Can anyone confirm this is the correct wiring for this configuration and, if not, what it should be? If this is correct, how best to isolate the problem? Thanks!

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