What does the Vaillant S.026 fault code mean?

Your boiler is currently heating the water stored in your hot water tank and is finishing its cooling cycle, which is a normal part of its operation.

How much does it cost to fix Vaillant error code S.026?

Cost varies. Contact a Gas Safe registered engineer for a quote.

Vaillant S.026 Fault Code: What It Means & How to Fix It

What the manual says

Manufacturer manual

The domestic hot water cylinder charging is active and the fan is in overrun mode.

From this model's manual

Verified against the Vaillant/Vaillant Ecotec Plus installation & service manual.

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Related fault codes

S.024View →S.025View →

All 281 fault codes on the ecoTEC plus Combi

Seeing a different code? Every code this model can display, in one place.

con D.000 D.001 D.002 D.003 D.004 D.005 D.006 D.008 D.009 D.010 D.011 D.012 D.013 D.015 D.016 D.017 D.018 D.020 D.021 D.022 D.023 D.025 D.026 D.027 D.028 D.029 D.031 D.033 D.034 D.035 D.036 D.039 D.040 D.041 D.043 D.045 D.047 D.052 D.058 D.060 D.061 D.062 D.064 D.065 D.066 D.067 D.068 D.069 D.070 D.071 D.072 D.073 D.074 D.075 D.077 D.078 D.080 D.081 D.082 D.083 D.084 D.085 D.088 D.090 D.091 D.092 D.093 D.094 D.095 D.096 D.098 D.124 D.125 D.128 D.129 D.145 D.146 D.147 D.156 D.157 D.158 D.159 D.160 D.161 D.162 D.163 D.164 D.166 D.167 D.170 D.171 D.172 D.173 D.174 D.175 D.182 D.185 D.186 D.187 F.000 F.001 F.002 F.003 F.010 F.011 F.012 F.013 F.020 F.022 F.023 F.024 F.025 F.027 F.028 F.029 F.032 F.035 F.040 F.042 F.044 F.047 F.049 F.057 F.061 F.062 F.063 F.064 F.065 F.067 F.068 F.070 F.071 F.072 F.074 F.075 F.076 F.077 F.078 F.080 F.081 F.083 F.084 F.085 F.087 F.088 F.089 F.090 F.092 F.095 F.096 F.097 F.105 F.194 F.195 F.196 F.317 F.318 F.320 F.321 F.322 F.323 F.324 F.325 F.326 F.327 F.330 F.334 F.336 F.337 F.338 F.342 F.343 F.344 F.347 F.363 F.707 F.905 I.003 I.020 I.144 L.016 L.022 L.025 L.032 L.095 L.096 L.097 L.105 L.144 L.194 L.195 L.196 L.319 L.320 L.322 L.343 N.013 N.027 N.032 N.089 N.095 N.096 N.097 N.100 N.144 N.194 N.270 N.317 N.319 N.324 N.343 P.000 P.2 P.008 S.0 S.000 S.1 S.001 S.2 S.002 S.003 S.4 S.004 S.005 S.006 S.7 S.007 S.008 S.009 S.10 S.010 S.11 S.011 S.012 S.013 S.014 S.15 S.015 S.016 S.17 S.017 S.019 S.20 S.020 S.021 S.022 S.023 S.024 S.025 S.027 S.028 S.029 S.030 S.031 S.032 S.034 S.039 S.041 S.042 S.054 S.057 S.059 S.088 S.091 S.092 S.093 S.096 S.097 S.098 S.109 S.175 S.199 S.326 S.328 S.335 S.341 S.599 T.001 T.007

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Your boiler is currently heating the water stored in your hot water tank and is finishing its cooling cycle, which is a normal part of its operation.

What the manual says

Engineer required

Avoid the next call-out bill

Related fault codes

All 281 fault codes on the ecoTEC plus Combi

Related guides you might find useful

No hot water but heating works

Yellow or orange flame — CO safety

Is boiler cover worth it?

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