Part Location Diagram of 5210810031 DeLonghi Thermostat
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Thermostat 5210810031

Manufactured by:
DeLonghi
ERP Number:
ERP10310446
Part Number:
5210810031
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Easy 

15 - 30 mins 

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Product Description

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This is an authentic OEM sourced replacement part which is specially designed for DeLonghi equipment. The thermostat is used to monitor the heat level in the machine, unfortunately, over time it may wear out or get damaged eventually requiring a replacement. Keep in mind this high-quality item is made of durable materials and is sold individually.

Troubleshooting

This part works with the following brands:
  • DeLonghi
This part works with the following products:
  • Heater

Customer Part Reviews

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Customer Repair Instructions

All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part.

Easy 

15 - 30 mins 

(9 rated repairs) ?
  • 1
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Thermostat and switch were bad and showed heat damage. Some of the internal wire connectors and power cord plug show heat damage.

Michael from COLORADO SPRINGS, Colorado

3 of 3 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
30 - 60 mins
Tools:
Screw drivers
Parts Used:
5108007700, 5210810031
1. Removed old Thermostat and switch.
2. Installed new Thermostat and switch.
3. Replace old power cord plug.
4. Replaced crimp connectors on the wires at the thermostat and switch.
These oil filled radiator heaters are the easiest heaters to repair, service and clean. They have very few parts, easy access to th e internal components and no fan or motor to deal with.
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The thermostat points were burned up beyond use

gregory from Beaverton, Oregon

3 of 3 people found this instruction helpful.
Difficulty Level:
A Bit Difficult
Total Repair Time:
30 - 60 mins
Tools:
Screw drivers
Parts Used:
5210810031
Replacing the Thermostat in a DeLonghi Portable Oil Filled Heater (Type 9707)
Part #: 5210810031 (Thermostat)

Replacing the part was not too difficult; the hardest part was getting to the metal tab that secures the metal heater front panel containing the controls to the oil filled radiator. The tab is part of the seal ed radiator portion of the heater and not easily accessible, even if you pry off the dark grey plastic cover over the controls. Prying off this plastic control cover will break the tabs that secure it in place and possibly break the cover itself. This will not allow you easier access to the metal tab because the control mounting plate is screwed to the front heater panel from the inside.

The steps to take are as follows;
1. Lay the heater on its side and remove the 2 screws on the bottom of the metal front cover that houses the controls. With the screws removed, pull out on the bottom of the front panel far enough to disconnect the 3 wires attached to the radiator heating element.

2. Here is the hardest part. While pulling out on the bottom of the cover, use a long thin screw driver or something similar to pry down the metal tab until it is nearly straight out so you can remove the front panel of the heater. For reference, there is a similar tab at the rear of the heater but does not need to be removed.

3. After removing the front panel, remove the 2 wire connectors from the thermostat. Then remove the 3 screws that hold the control mounting plate to the inside of the front panel in order to access the 2 screws that hold the thermostat to the control panel.

4. Remove the red control knob from the thermostat and then remove the 2 screws holding the thermostat to the panel and replace it with the new part #5210810031. Reposition the new thermostat and replace the mounting screws. Align the control knob to the flat side on the thermostat adjustment shaft and push it back on.

5. Reposition the control mounting plate on the heater front panel and replace the 3 securing screws then reconnect the wires to the terminals on the thermostat.

6. At this point you can place the front heater panel onto the metal tab that held the top secure and try to bend the tab back up. If you find it too difficult to bend the tab back up enough to securely hold the top of the front panel here is a suggestion.

(Straighten and flatten the metal tab so it points directly toward the front of the heater and aligns well with the slot in the flange of the front panel. Reconnect the wires to the heating element then position the front panel over the tab and firmly against the front of the radiator. While holding the panel in place, replace the 2 screws on the bottom of the panel and stand the heater up on its casters. While pressing firmly against the top of the panel drill a 3/32\" hole through the top center of the panel just inside the rear flange and directly over and through the tab. Use a self tapping sheet metal screw to secure it.)

7. If you removed the dark grey plastic control cover you likely broke the plastic tabs that hold the cover in place. The heater will still function fine without the plastic cover but it will leave sharp screws and metal edges exposed. If this is the case you can order a new one from www.eReplacementParts.com.

Have fun \"Do-It-Yourselfers\"

Gregory Synarski
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bad thermostat

Jay from Bethany, West Virginia

2 of 2 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
15 - 30 mins
Tools:
Screw drivers
Parts Used:
5210810031
Removed bad thermostat, replaced it with new thermostat.
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fried thermostat in DeLonghi heater

joseph from morehead city, North Carolina

2 of 2 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
Less than 15 mins
Tools:
Screw drivers
Parts Used:
5210810031
Part arrived in short order. Easy in - easy out as described by previous DIY-er. Thanks, Joe
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12 year old heater had a termostat that stopped working. Unit was running hot and could not be adjusted .

Russell from HUBERT, North Carolina

1 person found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
15 - 30 mins
Tools:
Pliers, Screw drivers
Parts Used:
5210810031
I looked up my Heater model number and then was able to find the thermostat I needed. Shipping was fast. New thermostat was very easy to install and my heater now operates perfect.
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2 heaters. Broken rocker switch on one and broken thermostat on the other.

Joe from West Helena, Arkansas

1 person found this instruction helpful.
Difficulty Level:
A Bit Difficult
Total Repair Time:
30 - 60 mins
Tools:
Screw drivers
Parts Used:
5210810031, 511741
1. One screw removes side panel.
2. Removed the plastic covers. Had to break most of the plastic wings to get them off.
3. Disconnected the wires and found it interesting that each was wired a bit differently.
4. Removed old parts.
5. Replaced with new parts.
6. Reconnected wiring.
7. Replaced plastic c overs.
8. Replaced side panel with screw.
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Original thermostat failed, thus the unit would not heat up

ERNEST from YONKERS, New York

1 person found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
15 - 30 mins
Tools:
Screw drivers
Parts Used:
5210810031
Disassembled the control unit - 1 large and 4 small screws; pushed out the cover, pulled off the control knob, disconnected the 2 thermostat wires, unscrewed the old, screwed in the new, then reattached in reverse order. The diagram on your web site certainly helped to keep things in order, as the heater does not provide repair instructio ns.
Plugged it in, turned the knob and felt heat immediately - like new.
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Thermostat contact points welded together.

Gerald from Southfield, Michigan

1 person found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
15 - 30 mins
Tools:
Screw drivers
Parts Used:
5210810031
Unscrewed the housing from the heater and pried off the bezel surrounding the thermostat.
Then I disconnected the 2 wires from the thermostat and unscrewed the thermostat from the housing. To install the thermostat do the steps in the reverse order.
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thermostat contacts were burnt, not maintaining temperature properly

John from MARTINSVILLE, Indiana

0 of 1 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
15 - 30 mins
Tools:
Pliers, Screw drivers
Parts Used:
5210810031
Removed front wheels, which exposed 2 screws for front cover, remove front cover, unplug wires from heating element to fully detach front cover, remove wires from thermostat, replace thermostat, reinstall wires on thermostat and heating element. reassemble front cover and wheel assembly
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  • 1

Model Cross Reference

This part works with the following models:
ERP Number: ERP10310446
Manufacturer Part Number: 5210810031
Brand Model Number Description
DeLonghi 2307K Heater - Portable Radiator Heater
DeLonghi 2309K Heater - Oil Filled Heater
DeLonghi 2507 Heater - Portable Radiator Heater
DeLonghi 2507L Heater - Heater
DeLonghi 2507T Heater - Heater
DeLonghi 3107 Heater - Heater
DeLonghi 5307 Heater - Heater
DeLonghi 6507LEX Heater - Radiator Heater
DeLonghi 9707 Heater - Heater
DeLonghi 9707T Heater - Heater
DeLonghi CH15 Heater - Portable Room Heater
DeLonghi CH15F Heater - Heater
DeLonghi EW0507 Heater - Oil Filled Radiator
DeLonghi EW0507K Heater - Oil Filled Radiator
DeLonghi EW0507W Heater - Heater
DeLonghi EW0715M Heater - Oil Filled Heater
DeLonghi EW0715W Heater - Heater
DeLonghi EW6507L Heater - Portable Radiator Heater
DeLonghi EW6507M Heater - Oil Filled Panel Heater
DeLonghi EW7707CB Heater - Heater
DeLonghi EW7707CBA Heater - Oil Filled Radiator - 108770311 - Us Mx
DeLonghi EW7707CM Heater - Heater
DeLonghi F115 Heater - Heater
DeLonghi F1B Heater - Heater
DeLonghi F1U Heater - Heater
DeLonghi HM15 Heater - Heater
DeLonghi HM24B Heater - Heater
DeLonghi HM24W Heater - Heater
DeLonghi HM25 Heater - Dragon Oil Filled Heater
DeLonghi HM25T Heater - Heater