Extra Large LCD (Liquid Crystal Display) with Backlight provides added user friendliness and clearer viewing – even in the dark. Bought it last year in 0ct 2019 and was working fine but from last 2 months its screen starts playing up and now its 70% gone. I have a Combi boiler, and the Hot Water control is wired into the boiler 'Pre Heat' (Tip: with Pre Heat On opening a hot tap for a couple of seconds signals hot water required - give time for the boiler to heat up the Hot Water heat exchange before running off hot water - saves lots of water and gets you hot water quicker, also if the boiler valve is in the Central Heating position it needs time to change over).

Equipped with advanced technology, the Honeywell ST9400A utilizes a two-channel control system, facilitating independent control of heating and hot water. The heating and hot water programmes are completely independent to allow the system to be operated in the most energy efficient manner possible. The unit has independent controls to Override the time switch setting (turn On when Off or Off when On) and also Boost to just give 1 - 3 hours extra On time. They help us to identify popular products and understand your browsing habits so we can display relevant adverts to you.The unit came with the time and date already set, it had also been programmed, so it was ready to go. The 103 third parties who use cookies on this service do so for their purposes of displaying and measuring personalized ads, generating audience insights, and developing and improving products. Afghanistan, Algeria, American Samoa, Angola, Anguilla, Antigua and Barbuda, Argentina, Armenia, Aruba, Azerbaijan Republic, Bahamas, Bahrain, Bangladesh, Barbados, Belize, Benin, Bermuda, Bhutan, Bolivia, Botswana, Brazil, British Virgin Islands, Brunei Darussalam, Burkina Faso, Burundi, Cambodia, Cameroon, Cape Verde Islands, Cayman Islands, Central African Republic, Chad, Chile, China, Colombia, Comoros, Cook Islands, Costa Rica, Côte d'Ivoire (Ivory Coast), Democratic Republic of the Congo, Djibouti, Dominica, Dominican Republic, Ecuador, Egypt, El Salvador, Equatorial Guinea, Eritrea, Ethiopia, Falkland Islands (Islas Malvinas), Fiji, France, French Guiana, French Polynesia, Gabon Republic, Gambia, Georgia, Germany, Ghana, Greenland, Grenada, Guadeloupe, Guam, Guatemala, Guinea, Guinea-Bissau, Guyana, Haiti, Honduras, Hong Kong, India, Indonesia, Iraq, Israel, Jamaica, Japan, Jordan, Kazakhstan, Kenya, Kiribati, Kuwait, Kyrgyzstan, Laos, Lebanon, Lesotho, Liberia, Libya, Macau, Madagascar, Malawi, Malaysia, Maldives, Mali, Marshall Islands, Martinique, Mauritania, Mauritius, Mayotte, Mexico, Micronesia, Mongolia, Montserrat, Morocco, Mozambique, Namibia, Nauru, Nepal, Netherlands Antilles, New Caledonia, New Zealand, Nicaragua, Niger, Nigeria, Niue, Oman, Pakistan, Palau, Panama, Papua New Guinea, Paraguay, Peru, Philippines, Puerto Rico, Qatar, Republic of the Congo, Reunion, Russian Federation, Rwanda, Saint Helena, Saint Kitts-Nevis, Saint Lucia, Saint Pierre and Miquelon, Saint Vincent and the Grenadines, Saudi Arabia, Senegal, Seychelles, Sierra Leone, Singapore, Solomon Islands, Somalia, South Africa, South Korea, Sri Lanka, Suriname, Swaziland, Taiwan, Tajikistan, Tanzania, Thailand, Togo, Tonga, Trinidad and Tobago, Tunisia, Turkey, Turkmenistan, Turks and Caicos Islands, Tuvalu, Uganda, United Arab Emirates, Uruguay, Uzbekistan, Vanuatu, Venezuela, Vietnam, Virgin Islands (U.

We're sorry but this product has now been discontinued by Honeywell Heating Supplies and can no longer be purchased. The unit is a 1 day full programmer with two on/off switching times per day (which can be increased to 3). You can change your choices at any time by visiting Cookie preferences, as described in the Cookie notice. In the Winter the Central Heating is set to Once a day (the Heating being controlled by the room state) - early morning to late at night, the Hot Water remains on its Auto setting.Is the Installer set-up programme for the ST9400A programmer always available to change parameters, even after set-up was completed a couple of years back, or is it a one time setting following a new installation ? They appreciate the durability and reliability of the product, and find it to be good value for money. All ST9400 models incorporate the Line of Text (LoT™) display that gives clear plain English instructions whenever any button or slider is used.

Several times recently the programmer has switched from auto to once for heating without any intervention from us. Heating and hot water systems based on boilers account for of this fi gure, so it is important to understand how your controls can help to maximize energy effi ciency while maintaining your comfort.Just one niggle, when the display is lit by a clear blue sky during the day the display shows dark patches. Read more about the seller notes “Very good physical condition comes with wall fixing bracket the timer has been bench tested and functions checked see pictures. Finance is provided by PayPal Credit (a trading name of PayPal UK Ltd, Whittaker House, Whittaker Avenue, Richmond-Upon-Thames, Surrey, United Kingdom, TW9 1EH). In conclusion, the Honeywell ST9400A temperature controller is a highly efficient and user-friendly solution for regulating heating and hot water systems in domestic premises.