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I have a honeywell smartfit but it keeps coming up with a F4 error

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I had exactly the same problem. F4 code says the control valve has jammed --- but it hadn’t.

I ended up having to swap out the room controller and the base unit (I bought the pair since it was winter and I couldn’t ‘eff’ about)

On investigating (well, you have to don’t you?) I could find no obvious fault but did notice that a large electrolytic capacitor was across the actuator motor.

Since these things work by reversing the supply polarity to the motor to drive the actuator one way and the other it strikes me as strange that a polarity sensitive component, one that must be always connecter positive to positive, is used in the way that it is.

Bottom line, tough luck, mate. Replace the units.

Posted on Jul 31, 2008

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Please , may i know f4 error code in split type air conditioner


Here is error code f4
light fan motor of indoor
1?Check whether the contact of the plug of the motor wire 8 unit fault and socket is well, making sure well contact.
2?Check whether the indoor motor has damaged, the motor should be replaced when it is damaged.
3?Check whether the controllable silicon and other components on the electric control board have damaged, replace the controllable silicon or electric control board when they are damaged.

click on the link below and scroll down the left side to find error code f4...CHEERS
http://www.chigo.bg/resources/pdf/Failure-code-manual.pdf

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1 Answer

When the indoor unit is on F4 fault error code display.please help to solve the problem.


f4 mean Air Conditioners Questions & Answers - Fixya

www.fixya.com > Forum > Tags > f4 mean
My gree split type ac error F4 what is problem Name of malfunction = Outdoor tube sensor open or short circuit Display of double eight code = F4 this means

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3 Answers

On my honeywell thermostat cool on keeps on flashing but ac dosent come on


On a Honeywell thermostat the flashing means that the system is in a delay to turn on the compressor. This is used to protect the compressor from coming on and off too often. The normal delay is about 5 minutes. After that the system should come on. If not there is s problem.

In order to help us help you we will need a little more information. What happens either at the inside unit or at the outside unit after the thermostat stops flashing "Cool"? Any fans come on? Do you hear a "KLUNK"? Any sparks? Please let us know so we can help.

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1 Answer

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1 Answer

I had a Honeywell F4- 0019 motorised two port valve on my central heating that has failed. I have replaced it with a Honeywell valve from Thompsons Plumbase, but on fitting noticed the new valve has six...


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1 Answer

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1 Answer

Honeywell Smartfit Control Unit


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Reply back what type of heating unit you have (gas or electric), any other symptoms you've observed (including has the system ever operated before, and what changes may have been implemented to cause it not to operate) and the model, and we can be of more help to you.

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1 Answer

My clock on my honeywell smartfit has frozen now the system will not work is it repairable


Before replacing the unit try replacing the batteries. After you replace the batteries push the run program button and see if the system comes back to life:)

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1 Answer

My central heating system comprises a worcester bosch system boiler and honeywell smartfit controls. The problem I am having is that the central heating doesn't seem to knock off at the preset temperature...


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