I have Fault Code 02 or 07 SAFE MODE on my Slimline storage heater. What does this mean?

Modified on Wed, 13 Sep 2023 at 04:43 PM

 Applicable to models:  

XLE050 XLE070 XLE100 XLE125 XLE150 

TSRE050 TSRE070 TSRE100 TSRE125 TSRE150 

NLSH050 NLSH070 NLSH100 NLSH100 NLSH125 NLSH150 

DESE050 DESE070 DESE100 DESE125 DESE150 

SSHE050 SSHE070 SSHE100 SSHE125 SSHE150 

VASH050E VASH070E VASH100E VASH125E VASH150E AC6550 AC6554 


Issue:  Error code 02 or 07 safe mode displayed.


What this means:  Means the heater thinks the room temperature it is sensing is not right. 



  • Please make sure the clearances around the heater are observed (see below). 
  • Clothes must not be dried on the heater; decorative radiator covers cannot be used and furniture such as sofas, beds or cabinets must not allow the air from the heater to “bounce” off furniture then back to the heater. 
  • If the error persists, switch the product off at the wall, then back on again.

If the product is not obstructed in any way and the error still persists then a service call will be required with Charge Controller (CC)  see additional help link below.

If possible you should check the following items and if they are not correct you should contact your installer prior to raising a ticket for a service call.


      • Have the trips in your consumer unit switched off?  (switch back on if they have)
      • Check that the switches controlling the supplies to your product are on
        • There should be a switch (unfused) for the off peak supply
        • The continuous supply should not be on a plug
      • Are the supply cables different sizes, off peak supply should be on a 2.5mm2 cable
      • Have you set up the user interface (control on the top of the product correctly?
      • Have you registered your product


Require additional help? Please follow link below


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