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My microfurnace heater has a thermostat problem. can I easily disconnect the thermostat so it works manually?

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  • Anonymous Jan 04, 2009

    My microfurnace runs wide open [1500 watts] It will not respond to the thermostat control as before. I cannot reduce the settings via the control knob.
    It appears the thermostat is not functioning.

  • Anonymous Mar 13, 2009

    I bought three months ago a Pelko Micro Furnace model MF-2209-L4, and I have a similar problem. The thermostat after few minutes of operation switches of power and nothing works. If you disconnect it from mains, it will work after 12 hours for few minutes. Can we disconnect the thermostat? My mail is [email protected]



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No heat for defroster nor vents.. always cold.. has anitfreeze..

Heater control problem. Switch. If fan does not work, then could be fuse for the system. Owner's manual? troubleshooting section? Almost sounds like the heater coil has been disconnected from the radiator hot water supply system. Perhaps the heater coil was leaking and disconnecting it solved the problem for them.

Mar 06, 2015 | 1994 Lexus LS 400

1 Answer

I have a Masport free-standing Vienna gas heater. Am able to light the pilot, but can't turn on heater. It is linked to an external thermostat. Would this stop the heater being turned on. C

If your external thermostat is set lower than the temperature in your house the heater will not come on. Make sure your thermostat is set higher than the room temperature and the heater should work. You can do this as an experiment just to try the heater for starting up. Then set it to the temperature you want for comfort. Do not disconnect the thermostat unless it is broken. Your thermostat maintanes the comfortable heat in your house.

Nov 03, 2014 | Heating & Cooling

1 Answer

Goodman wall mount heater not working

What type of thermostat digital or manual, if distal try to pull off front cover n see if that turn it off if it does this means u have a bad thermostat n needs to be replaced. If it's a manual then try to disconnect white wire on w screw ,of course turn power off to heater , and see if that turn heater off if so replace thermostat. Hope this was helpful.

Dec 28, 2013 | Goodman Heating & Cooling

1 Answer

Williams wall heater, lite pilot and heater comes on okay, but will only come off when I disconnect the thermostat?

If you have to disconnect the thermostat wire at the gas valve then it is either a shorted thermostat or a short in the thermostat wire.

If you only have to disconnect the thermostat from the wire, then it sounds like a bad thermostat, replace the thermostat

Apr 11, 2013 | Williams 2509612 Ceramic Mid-Size Heater

1 Answer

I have a 01 Saturn and the heat only works when the car gos fast. Then when stopped in idol the temperature raises and heater just blows cold air. Any ideas what's wrong with my car?

I would first start by having the antifreeze tested for temperature rate, just incase you have weak coolant. Then I would replace the thermostat. Sometimes thermostats are summer ones, and start seizing when cold temps hit. If none of these do the trick, I'd check the heater core. It may be plugged. You can do this 2 ways. 1, you can disconnect the 2 hoses from the heater core at the firewall, and flush the core. The water should flow through easily, no blockage at all. 2 Get the whole cooling system flushed and pressure tested. It should hold 14 psi easily. . I have a few questions though. Is your fan running continuously? Is your coolant level going down at all? I'd say it is a heater core issue though as I have an 02 saturn that used to do the same thing and a new heater core fixed it up fine. Hope this was helpful

Jan 04, 2013 | Cars & Trucks

1 Answer

1995 jeep cherokee heater problems

Get jeep up to operating temp
Turn on heater to max heat
Hood feel 2 heater core hoses goint into upper passenger side of engine compartment firewall.
They should feel too hot to hold
If it's not hot, could be 6 things
1. heater control valve is bad
2. Vacuum to heater control valve is bad
3. clogged heater core.
4. Bad thermostat
5. Bad waterpump
6. Needs more coolant (check when system is cold)

Do these things:

1. Disconnect vacuum line from control valve and feel under valve to manually move valve to open position. This should let hot water flow through core. If you now have heat inside, replace the heater control valve. Or you can disconnect the plunger on the heater control that is hooked on to the silver bar on the bottom of it. With it disconnected you can manually move it to the open position. It will always remain on.

2. When system is cold, disconnect both heater hoses going to heater core. hook up a water hose to one side of heater core and flush out any gunk. When you get done, the water should run clear. If you see lots of gunk come out, that was probably the problem. Replacement is like $20-30

3. When system is hot and engine running, squeeze the upper radiator hose (using gloves) when you release it you should feel a surge of water. Proves your water pump is working. If no surge, check thermostat. If thermostat checks good, look at the weep holes at the bottom of the water pump for traces of antifreeze. If you see a trace or stream of coolant, indicates bad pump.

4. As far as testing the thermostat, watch as your engine heats up on the gauge. when it gets to a certain point you will see the temperature rise, then lower, then rise again. This means your thermostat opened properly, cooling the system temporarily, then heated it back up. Replacement is around $5

Try these and see how it goes.

Feb 01, 2012 | 1995 Jeep Cherokee

1 Answer

When I turn on my Jackson Delta 5 it says that it is heating water, and that is all it will do. It will set like that until I disconnect the thermostat wire and plug it back in. Then it will continue the...

THIS could be your huckleberry! It is item 3 of suspects...
Also note ITEM 7, "heater delay relay"?

Disconnecting and reconnecting MAY be resetting that relay!?


BEFORE the heater element can be energized, the rinse
booster heater MUST be initially filled with water. Damage to
the heater element will occur if the element is not submerged
in water!

Here's your thermostat:

Jackson 5930-003-13-65 THERMOSTAT,
120-170 DEGREE "WAS"

thermo-xpxypaj2co3qxlf13c0q1l2g-5-0.jpg Find it here:

Jackson 5930 003 13 65 THERMOSTAT 120 170 DEGREE WAS
$137.11 plus shipping


eBay: Jackson thermostat 5930-003-06-48 175-195F
Item location: Camano Island, Washington, United States
Get your MANUAL here:

text: 'TEMP WASH AND RINSE: 120 degrees'
>>> 140 degrees recommended for BOTH (see page 3). <<<

TROUBLESHOOTING on Page 16 and 17!

"Wash temperature not at required reading."

1. Check that white/blue wires are connected.
2. Defective thermometer.
3. Defective thermostat.
4. Rinse heater defective.
5. Defective heater contactor (R2).
6. Incoming inlet water temperature below required minimum. 7. Defective heater delay relay (R4)

See ANOTHER GREAT troubleshooting chart here!

$50 please... JUST KIDDING

Feb 04, 2018 | Jackson Delta 5 Dishwasher

1 Answer


Disconnect thermostat wires from control board at furnace, put a jumper wire between r and w. Turn power back on, if it starts up and heats the problem is probably the thermostat

Feb 13, 2010 | Honeywell Programmable Thermostat Heater

1 Answer

Honeywell TB8220U1003 Thermostat--How do I manage KB lockout

The easiest way to find out that is to go here and look up your manual.
In the manual there will be instructions for you to easily follow.


Jan 28, 2010 | Honeywell Electronic Programmable...

1 Answer

Dryer running cold

you have to take side panel off to get at heater conections

Jun 26, 2008 | Dryers

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