717 Safety Valve 1 173 203 19 Pump head
The H07 error code on Ideal boilers indicates 717 safety valve 1 173 203 19 pump head.
Ideal H07 means: 717 safety valve 1 173 203 19 pump head. On this component the documented failure modes are no water circulation: pump blocked, seized or not running. A Gas Safe registered engineer should diagnose the root cause.
What Does H07 Mean
The H07 code is shown by the boiler’s control board when it detects 717 safety valve 1 173 203 19 pump head. The boiler then stops instead of continuing to run in that condition: the code is the appliance reporting a problem, not proof that the boiler is broken.
| What you see on the boiler |
|---|
| The display shows H07 and the boiler stops until the fault is cleared |
Common Causes
The manufacturer does not publish a cause list for this specific code. The causes below are the failure modes documented for the same component on other boilers, confirmed by the service literature of 5 different manufacturers.
| Cause |
|---|
| No water circulation: pump blocked, seized or not running |
Safety Warning
H07 is a gas-related fault. Never attempt to repair or adjust the gas valve, burner assembly, or flue system yourself. All gas work must be carried out by a Gas Safe registered engineer (UK) or licensed HVAC technician (US). Repeated resets after ignition failure can cause unburnt gas to accumulate inside the combustion chamber — this is a serious safety hazard. If you smell gas at any point, turn off the gas supply at the meter, open windows, leave the property, and call your gas emergency service immediately. Warning: this fault code may relate to gas supply, flue or combustion issues. Do not attempt repair — contact a Gas Safe registered engineer immediately.
Parts & Prices
Prices shown are indicative. Actual prices and availability vary by region.
How to Fix It
Replace the fan motor assembly if bearings are worn or motor is not running
replace the air pressure switch if it is stuck or reading incorrectly
clear any flue or condensate blockage
repair or replace damaged wiring
if PCB is not providing the signal, replace the PCB
Refer to the Ideal service documentation for the detailed procedure. Only a qualified engineer should carry out these repairs.
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Affected Models
Ideal models that can display fault code H07:
| Model Family | Output Range | Frequency |
|---|---|---|
| All Ideal models | — | Possible |
Frequently Asked Questions
Replace the fan motor assembly if bearings are worn or motor is not running. According to the technical documentation, this is the first check on the list for H07.
H07 is classified as a high-severity fault: it involves gas, combustion or flue components. Do not keep resetting the boiler and do not attempt the repair yourself — call a Gas Safe registered engineer.