Dreo Heater Error Codes: E1, E2, FF, F2, P4 and PP

By Ray Bennett · Updated 23 October 2026 · 8 min read · Checked against the maker’s manual

Dreo Heater Error Codes: E1, E2, FF, F2, P4 and PP

Short answer

Dreo heaters show a code on the LED display, and Dreo's own product pages explain them. FF or F2 is overheat protection: unplug it and let it cool before plugging it back in. P4 is tip-over protection: stand it on a flat, level, stable surface. E1 and E2 are temperature sensor faults, with no owner fix; most of Dreo's pages say to unplug it and contact Customer Support.

Dreo heater error codes show on the heater’s LED display, and Dreo explains them in the questions on each heater’s own product page. They fall into two kinds: codes you can clear, such as FF for overheat or P4 for tip-over, and E codes, where most of Dreo’s pages say to unplug the heater and contact Customer Support.

One thing catches people out. Overheat protection is FF on most of the Dreo portable heaters here but F2 on the Convection Heater 711 and 711S and on the wall heaters. Everything below comes from Dreo’s own product pages, read on 23 and 24 October 2026, and each code stays with the heaters whose page lists it.

Before you start

What to carry: nothing but the heater’s model name. Every step here is done by hand with the heater unplugged.

Gas or electric? Electric. These are plug-in heaters; Dreo’s page for the MC706 says it is for use on a nominal 120V circuit and should be connected to a grounding outlet.

Is it on the list? Dreo’s codes are not the same on every model. Find your heater’s name in the table further down before you act on a code.

Plug it straight into the wall, and never cover it.
No extension cord, no shared outlet. Dreo’s MC706 page says to avoid using extension cords and not to share the same outlet with other household appliances, and to avoid overheating, do not cover the heater.

Unplug first. For an overheat, and for the E codes on most of its pages, Dreo’s first step is to unplug the heater; after an overheat, let it cool down before plugging it in again.

A sensor code is not for home repair. For E1 and E2, and E0 on the wall heaters, Dreo gives no owner fix; most of its pages say to unplug the heater from the power source and contact Customer Support.

Clear it, or call Dreo

Dreo’s answers split the codes in two. The protection codes tell you something you can put right, and the heater can be plugged in again once you have. The E codes are faults Dreo wants to hear about.

Dreo's heater codes in two groups. A, the protection codes you can clear: FF or F2 overheat, P4 tip-over, and BF on the wall heaters. B, the E codes, where most of Dreo's pages say to unplug the heater and contact Customer Support.

Dreo heater	Codes on its product page
Solaris 718, Solaris 319, Heater 322, Solaris Slim H2, Whole-Room 714, 715 and 720, Ceramic Heater 314	E1, E2, FF overheat, P4 tip-over
Convection Heater 711 and 711S	E1, E2, F2 overheat, P4 tip-over
Atom One, Atom 316, Solaris Slim H3, Solaris Max 2nd Gen, OH521 radiator	E1, E2, and FF when the room is above 50°C (122°F)
WH719S wall heater	E0, E1, F1, F2 overheat, BF, and PP on the FortPlug model
739AS wall heater	E0, E1, F2 overheat, BF

What each code means

Code	What Dreo’s pages say
E1	Temperature sensor open circuit (a temperature sensor error on the 739AS)
E2	Temperature sensor short circuit
E0	On the 739AS, a PCBA panel connection error; on the WH719S, unplug and contact Customer Support
FF	Overheat protection
F2	Overheat protection, on the 711, 711S, WH719S and 739AS
P4	Tip-over protection
F1	Outlet fin protection error, on the WH719S
BF	Outlet fin deviation, on the WH719S and 739AS
PP	FortPlug restorable overheat protection, on the DR-HSH009BS FortPlug wall heater

What you can check

Check 1Free, the time it takes to cool

With FF or F2, unplug it and let it cool

Where Dreo’s code answers name FF or F2 as overheat protection, the answer is the same: unplug the heater and wait for it to cool down before plugging it in again. Its pages for heaters that will not start add: remove any objects on or near the heater. Dreo’s Solaris 718, WH719S and OH521 pages say to keep furniture, bedding, papers, clothes and curtains at least 3 feet (0.9 m) from the front and away from the sides, and not to let bare skin touch hot surfaces. For F2 on the 739AS wall heater, Dreo also says to check and clean the air inlet. Dreo’s cleaning answer on its Solaris 718 and OH521 pages: switch it off, unplug it, let it cool, use only a soft cloth, and do not let water run into the heater.

On the Atom One, Atom 316, Solaris Slim H3, Solaris Max 2nd Gen and OH521 radiator, Dreo says the heater stops heating when the room is above 50°C (122°F), shows FF and beeps. Unplug it and power it on again once the room has dropped below that. On the Solaris 718, if FF persists, Dreo says to contact customer support at support@dreo.com.

ONE OVERHEAT, TWO CODES

A Shows FF FF Solaris 718, 319, Heater 322, Solaris Slim H2 and H3, Whole-Room 714, 715, 720, Ceramic Heater 314, Atom One, Atom 316, Solaris Max, OH521

B Shows F2 F2 Convection Heater 711 and 711S, WH719S and 739AS wall heaters 739AS: also check and clean the air inlet

Both mean overheat protection: unplug the heater, let it cool, then plug it in again.

Overheat protection has two names on the Dreo heaters here: FF on most of the portable models, F2 on the Convection Heater 711 and 711S and the WH719S and 739AS wall heaters. Dreo's answer for both is to unplug the heater and let it cool down before plugging it in again.

Check 2Free, a moment

With P4, stand it on a flat, level surface

P4 is tip-over protection. Dreo says to place the heater back on a flat, level and stable surface. On the Solaris 718, Dreo adds that if the problem persists, contact customer support at support@dreo.com.

Check 3Free; nothing to open

With BF or F1 on a wall heater, look at the outlet fin

BF is outlet fin deviation on the WH719S and 739AS. Dreo says to make sure there are no objects obstructing the outlet fin and restart the heater, and not to adjust the outlet fin angle by hand. If the problem persists, contact Customer Support.

F1 on the WH719S is an outlet fin protection error. Dreo says to wait until the heater cools down to restart it and make sure the outlet fin is working properly, and to contact Customer Support if it persists.

Check 4Free, a look at the plug

With PP on a FortPlug wall heater, check the outlet and the cord

Dreo says its DR-HSH009BS FortPlug model shows PP, with the power light flashing, when its FortPlug restorable overheat protection, there to prevent fire accidents, is activated. Unplug the heater, then check these points from Dreo’s list:

The socket is not loose or aged.
The outlet is not shared with other appliances.
The heater is not plugged in through an extension cord.
The plug is not bent or damaged.
The power cord is not tied or pressed by other objects.

Dreo says the heater works again once the power is back to normal.

Check 5Free to report; Dreo decides the fix

With E0, E1 or E2, unplug it and contact Dreo

For E1 and E2 on the 319, 322, Slim H2, Whole-Room, Ceramic 314, 711, 711S and OH521 pages, and E0 and E1 on the wall heaters, Dreo’s answer is to unplug the heater from the power source and contact Customer Support. On the Atom One, Atom 316, Solaris Slim H3 and Solaris Max 2nd Gen pages, E1 has no step, and the E2 answer is: take a short video to confirm and replace it. The Solaris 718 page says to contact customer support at support@dreo.com.

Have the model name and the code ready. Dreo gives support@dreo.com as its address on the Solaris 718 and OH521 pages.

Not every stop is a fault

ECO mode. Dreo says that in ECO mode the heater turns off when the set temperature is reached and comes back on when the room is cooler. If it turns off too often, Dreo suggests raising the set temperature or switching to Power Heat mode.

The 24 hour shut off. Dreo’s Solaris 718 page says the heater turns itself off after 24 hours of working, and the feature can be switched on or off by holding the time button for 3 seconds on standby. The display then shows 0F or 00, which are that setting, not error codes.

A new heater’s smell. Dreo’s MC706 page says a brand new heater has a slight odor, and to run it with ventilation for the first few uses.

What each one takes

What you see	What the work involves
FF or F2	Unplugging, cooling, and clearing anything on or near the heater
P4	A flat, level, stable spot
BF or F1 on a wall heater	Clearing anything blocking the outlet fin, without moving the fin by hand
PP	Its own wall outlet, with no extension cord or damaged plug
E0, E1 or E2	Dreo’s Customer Support
0F or 00 on the Solaris 718	Nothing; that is the 24 hour shut off setting

Questions people ask

What does E1 mean on a Dreo heater?

Dreo’s pages call E1 a temperature sensor open circuit, or a temperature sensor error on the 739AS wall heater. Most of Dreo’s pages say to unplug the heater and contact Customer Support.

What does FF mean on a Dreo heater?

Overheat protection. Dreo says to unplug the heater and wait for it to cool down before plugging it in again, and to remove any objects on or near it.

What does P4 mean on a Dreo heater?

Tip-over protection. Dreo says to place the heater back on a flat, level and stable surface.

What does PP mean on a Dreo heater?

On Dreo’s DR-HSH009BS FortPlug wall heater, PP is its restorable overheat protection. Unplug it and check for a loose or aged socket, a shared outlet, an extension cord, a bent or damaged plug, or a cord tied or pressed by other objects.

Can I fix an E2 code myself?

Dreo does not give an owner fix for E2, a temperature sensor short circuit. Most of its pages say to unplug the heater and contact Customer Support.

The other heater guides: space heater not working, space heater making noise, electric wall heater not working and Pelonis heater error codes.

Sources: Dreo's product page FAQs (dreo.com, read 23 and 24 October 2026) for the Atom One, Atom 316, Solaris Slim H2 and H3, Solaris Max 2nd Gen, Solaris 718 and 319, Heater 322, Whole-Room 714, 715 and 720, Ceramic Heater 314, Convection Heater 711 and 711S, OH521 radiator, MC706, and the WH719S and 739AS wall heaters